Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd63f8d3776e8046…

MALICIOUS

PDF

47.9 KB Created: 2020-10-25 23:03:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b803ab8f8a12f9cb7e79f2c9acc2c67c SHA-1: d292a394f2f41c7e51718517d7ccdf47547097d9 SHA-256: cd63f8d3776e804616c6f24aac58eb82b35dd51e91a09c95831b2de329995cf8
162 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?keyword=tafseer+jalalain+arabic+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f906ff8bf3ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f912a68d2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f8a6efb100d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5f95408fda0cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f870aeed0c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5f93fdf3c523f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5f945d7850805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5f8dbf326937c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f88991329f09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f63441-0d5f-4516-8747-11e36ccd69e1/ip_range_subnet_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ecd4c14-00fe-4361-a1d0-b9648c5e99bd/gegonumutigekodakurav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5628b912-bb7b-414b-8da0-9a94376a3c61/84220334618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453438c3-780e-453a-83b2-fd425ae16e2a/ribakol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0442501f-4787-4cf9-a5b9-370c9032a46f/relibitevigelaj.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/kofitebegemijabuluwo.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/ashrae_standard_62-_1989.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/gomivilof.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/amari_information_geometry_and_its_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0826/1795/files/rittal_product_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6003/5235/files/arabic_iptv_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9326/9923/files/download_facebook_messages_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8570/2319/files/kikutidifedefixuwexomad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0501/2900/files/payday_crime_war_free_download_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7583/3508/files/begitaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8940/5126/files/osprey_farpoint_55_carry_on.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6420 5316 bytes
SHA-256: 995b893eac9889e9ca542df9ed348c426db68c7c30592b012728bc407de2a546
font_01_sfnt_off00007630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7630 10772 bytes
SHA-256: 36e3655d4b39d036e7d21eece9093db9228cc348f6e0811bf80781e952d6898b
font_02_sfnt_off00009a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6E 16836 bytes
SHA-256: e9fc85ae7b9ff9f26942e2be49e9640b5d93b3f6284cfc13107cd12154b0b279