Malicious PDF — malware analysis report

Static analysis result for SHA-256 8979a778b3480b14…

MALICIOUS

PDF

69.0 KB Created: 2020-10-21 22:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fd762f49286e8d2b5521885a8e1ac0e SHA-1: 54e7175fe9785c1ce4d7b5d8f1f8238aef9e3153 SHA-256: 8979a778b3480b140ec03f9fec5e4fbd476baa318c10cfb76098f9f959a62795
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of external links, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=doppler+shift+equation+pdf', is flagged as a known malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

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://ttraff.cc/pify?keyword=doppler+shift+equation+pdf
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5f8a9a203e6ef.pdf
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f8b1b6235caa.pdf
    • https://cdn-cms.f-static.net/uploads/4387035/normal_5f8e8d7c25478.pdf
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f87609b4f471.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e9fcdd78-a58f-40c1-a8a0-f432accc09ad/perolukagawozig.pdf
    • https://uploads.strikinglycdn.com/files/5307b830-38b2-4083-8e60-097f6213827d/logaritmo_exercicios_propriedades.pdf
    • https://uploads.strikinglycdn.com/files/526a38c8-d4cb-4189-bafc-59effadf0eb3/36025169730.pdf
    • https://uploads.strikinglycdn.com/files/5c6fe524-b446-421e-889a-cf94f8ddc1cc/60830930254.pdf
    • https://uploads.strikinglycdn.com/files/cf4e5e12-8ccf-4bfe-97c3-aeb900d27662/ayakl_bela.pdf
    • https://s3.amazonaws.com/henghuili-files2/dolufikufexobuj.pdf
    • https://s3.amazonaws.com/fasanag/5th_grade_math_decimals_worksheets.pdf
    • https://s3.amazonaws.com/susopuzupure/rewezugaxijotim.pdf
    • https://s3.amazonaws.com/leguvefu/bojerotuxigadunobedo.pdf
    • https://s3.amazonaws.com/pazifetanegapu/septoplastia_procedimiento_quirurgico.pdf
    • https://s3.amazonaws.com/felasorarabipis/53645561461.pdf
    • https://s3.amazonaws.com/leguvefu/93172207278.pdf
    • https://cdn.shopify.com/s/files/1/0266/8625/9388/files/kapunutiwogojedageb.pdf
    • https://cdn.shopify.com/s/files/1/0499/4374/0571/files/tronical_tune_manual_german.pdf
    • https://cdn.shopify.com/s/files/1/0486/5726/8886/files/45872915529.pdf
    • https://cdn.shopify.com/s/files/1/0481/5775/3497/files/criminalistics_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0477/3920/7836/files/elico_cl_378_flame_photometer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0500/7153/5774/files/funny_car_stickers_for_guys.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa1d.bin
ca4d75f7df990a701d7b35571677d9b34354509c2bab700be5bf5ecc93fdf885		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA1D 5136 bytes
font_01_sfnt_off0000bb82.bin
21d6813b1b0112d55d3282e59778a0e1be3ff7ad014171c9a3387217dc5d490a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB82 11572 bytes
font_02_sfnt_off0000e30b.bin
20e17c5c6e272c31f697fdc8e535edf90d7815d3fc1b6cdecd13d57b873f2fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 16144 bytes
font_03_sfnt_off0000f803.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF803 4324 bytes

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