Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb554271cb2d3fa…

MALICIOUS

PDF

43.6 KB Created: 2020-08-13 23:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3da5125cc792162dc17563449c3765d7 SHA-1: b10304c24df5a8e01623b6e3f12ef8420b475d3b SHA-256: acb554271cb2d3fa80390425b4ee707fde38d6108a7ee4118ca0b1f8aab06945
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector at https://ttraff.ru/pify. The document body, though heavily obfuscated, contains the URL which is likely intended to deceive the user into believing it is a legitimate document. The presence of numerous links to PDFs hosted on various domains suggests a link farm designed to distribute malicious content or improve SEO for malicious sites.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=gre+argument+essay+pool+pdf In PDF document text
    • http://files.intlsimdriversclub.com/uploads/1/3/0/7/130776485/5515734.pdfIn PDF document text
    • http://files.caitlinshepherdphd.com/uploads/1/3/0/8/130815093/287148fa8.pdfIn PDF document text
    • http://jediwojod.deewiegand.com/uploads/1/3/1/4/131407227/4f087b1bda582.pdfIn PDF document text
    • http://files.fingerlakesathletics.com/uploads/1/3/1/3/131383510/3877777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/61304012588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2288/3735/files/anestesia_local_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/20619596330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/a_twist_in_my_story_album.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16485275060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/advanced_workout_routine_for_mass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/isometric_view_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/bill_check_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/class_diagram_for_railway_reservation_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/botany_practical_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/65694890260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0755/6258/files/papoxolejozugoxemigar.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1E 5496 bytes
SHA-256: 5afd7c524076015500c043b565fa950154909d6452422ca64372c47dbad00cc3
font_01_sfnt_off00007ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC8 10052 bytes
SHA-256: 7cc6b7bc9c6f4dcd0ae5f92885276931d890cd544fec37c78380ecc4738b8d5e

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