Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e6d1b80a395759…

MALICIOUS

PDF

70.1 KB Created: 2020-08-10 23:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77c360aa8dbc15202dafd86e4bdda907 SHA-1: 3db08d97f02c072cc0d0c97f150f70d0c335fbb4 SHA-256: 31e6d1b80a39575978179855f5ca721fc7a8fca43d67f49933d1aca1f22e0f9c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a title related to vitamin absorption, suggesting a lure. The PDF also contains a mass external PDF link farm, with many links hosted on Shopify, likely to obscure the malicious redirector. No scripts were extracted from this sample.

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=absorcion+de+vitaminas+hidrosolubles+pdf In PDF document text
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdfIn PDF document text
    • http://files.nhpsathletics.com/uploads/1/3/1/4/131408970/fomizalelu.pdfIn PDF document text
    • http://files.papercranesoaps.com/uploads/1/3/0/7/130776661/xevuwozaniru_xufebavonobagi_lubevinov.pdfIn PDF document text
    • http://files.wakecountybands.com/uploads/1/3/1/8/131856076/6b0f5b7d0b71.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/1/0432/9255/7462/files/favopusisaxepobokozew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/59988817370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/online_autocad_converter_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3889/1419/files/9210328873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6700/6364/files/zavavasited.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/zekam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/16536112387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1051/2280/files/ets_gre_verbal_reasoning_practice_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/rawupexikojafanuvexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/34147844456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/49705625022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8764/2270/files/kalimba_songs.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 8

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_off0000d249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD249 5584 bytes
SHA-256: 7a31bf438537546817a4c9683db6c7249043142ce9506f0b8ece2f68aa853fa3
font_01_sfnt_off0000e516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE516 11172 bytes
SHA-256: eb43fe658ef86cd6b5b96c818a1f0045aa230c5ace69570242ab957517e2b8bd

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