Malicious PDF — malware analysis report

Static analysis result for SHA-256 16bed71d4baab0a7…

MALICIOUS

PDF

84.8 KB Created: 2020-10-03 00:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89bbfce8abba7af81a24edf6f18788d0 SHA-1: 9729cc8520180c67326f1cff257c81a30ec8b1e1 SHA-256: 16bed71d4baab0a7d92479622c2242fdd0972ad44ab582a29e076aa2c46b0409
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits malicious characteristics, including a high ML classifier score and the presence of numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/strik?keyword=tamil+movie+songs++tamilrockers'. The document body, though heavily obfuscated, also contains this URL and other links pointing to a large PDF link farm, suggesting a coordinated effort to drive traffic to potentially harmful sites. The presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to redirect users to malicious content, likely as part of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?keyword=tamil+movie+songs++tamilrockers
    • https://site-1040178.mozfiles.com/files/1040178/lilunosopiginabokaxonit.pdf
    • https://site-1040347.mozfiles.com/files/1040347/7496022742.pdf
    • https://site-1039341.mozfiles.com/files/1039341/gagovukowugi.pdf
    • https://site-1037222.mozfiles.com/files/1037222/zutajozetepufafomibixu.pdf
    • https://site-1039777.mozfiles.com/files/1039777/zavalejezagaxixuxog.pdf
    • http://guzup.grafordisd.net/uploads/1/3/0/7/130775830/wisotekono.pdf
    • http://files.cunninghampeaches.com/uploads/1/3/2/6/132682806/kikogi.pdf
    • http://files.msudestinationauction.com/uploads/1/3/2/7/132740375/ac0892c1d212a1a.pdf
    • http://files.dveart.com/uploads/1/3/1/0/131071082/c75be4cfc47.pdf
    • http://files.rsvpvolunteercaregivers.org/uploads/1/3/2/6/132681824/navate.pdf
    • https://site-1041284.mozfiles.com/files/1041284/99510910754.pdf
    • https://site-1036815.mozfiles.com/files/1036815/timepezemeza.pdf
    • https://site-1038407.mozfiles.com/files/1038407/63733594339.pdf
    • https://site-1038468.mozfiles.com/files/1038468/67801635916.pdf
    • https://site-1037860.mozfiles.com/files/1037860/tupusasubibijugal.pdf
    • https://site-1037856.mozfiles.com/files/1037856/26977112390.pdf
    • https://site-1041766.mozfiles.com/files/1041766/sulabegazobazi.pdf
    • http:///\/www.paatuvarigal.com\/2016\/03\/kaalam-yen-kadhali-lyrics-from-24.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Apr
    • http:///\/www.paatuvarigal.com\/2016\/03\/jithu-jilladi-lyrics-from-their.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Apr
    • http:///\/www.paadalvarigal.com\/3696\/shoot-the-kuruvi-jil-jung-juk-song-lyrics.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Nov
    • http:///\/www.paadalvarigal.com\/3846\/hey-mama-sethupathi-song-lyrics.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Jan
    • http:///\/www.paadalvarigal.com\/2503\/you-are-my-darling-vaalu-song-lyrics.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Aug
    • http:///www.paadalvarigal.com/3745/3745/thillu-mullu-gethu-song-lyrics.html?utm_source
    • http:///\/www.tsonglyrics.com\/2015\/10\/naanum-rowdythaan-title-track-lyrics.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Sep
    • http:///\/www.paadalvarigal.com\/3575\/kannaane-kanne-naanum-rowdydhaan-song-lyrics.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Sep
    • http:///\/www.paadalvarigal.com\/3693\/aranmanai-aranmanai-aranmanai-2-song-lyrics.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Dec
    • http:///\/www.paadalvarigal.com\/3197\/naan-aval-illai-masss-song-lyrics.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:May
    • http:///\/www.paadalvarigal.com\/3325\/iphone-6-nee-yendral-indru-netru-naalai-song-lyrics.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Jun
    • http:///\/lyrics.wikia.com\/wiki\/Shankar_Mahadevan:Therikkudhu_Masss,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:May
    • http:///\/www.paadalvarigal.com\/3709\/domer-u-lord-u-jil-jung-juk-song-
    • http:///\/www.lyricsinbox.com\/4448\/thaen-kaatru-lyrics-gethu,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Dec
    • http:///\/www.paadalvarigal.com\/3598\/varavaa-varavaa-naanum-rowdydhaan-song-lyrics.html,video_url:,zoomit:0,premium_content:0,rest_lev:0,rest_msg_free:null,rest_msg_paid:null,_e:0,aes_enabled:1,aet:1,release_date:Sep
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108b9.bin
c46e1911ba7ba3931cd056e414743854be129f83db4b20fc61f7cbcb0ee4cad7
pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 5192 bytes
font_01_sfnt_off00011a56.bin
955045072c5578072656284d666e88cba68302c37e9ead80c02fa8a6580892f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A56 14104 bytes