Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a466bd2f3ff368…

MALICIOUS

PDF

56.5 KB Created: 2020-08-20 20:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40b5870f44456621ecce0d7dc6fae285 SHA-1: bcc6554fa72e225e46291aa505df9c81ed67bc02 SHA-256: 83a466bd2f3ff368527f22c1d7bebaa615b4896f22a01d76f4cca5fba6248b3d
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and link farming, including a critical finding for a link to known malicious redirector infrastructure. The embedded URL points to 'ttraff.ru', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise the malicious link. The ML classifier strongly supports the malicious verdict.

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=strength+of+materials+multiple+choice+questions+pdf In PDF document text
    • http://files.paristaxi1.com/uploads/1/3/0/7/130776175/zivumolazuj_zowedogoji.pdfIn PDF document text
    • http://files.madebymitchell.com/uploads/1/3/1/4/131437091/5143135.pdfIn PDF document text
    • http://mawepus.cometboosterclub.com/uploads/1/3/0/7/130739602/2901478.pdfIn PDF document text
    • http://foluferaf.canadaparkour.com/uploads/1/3/0/8/130874153/2672504.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/1/0431/0849/9618/files/72252105553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/xafevuwilanumix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/jaregasesojijebatawelok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/gaxinesotureniserorabox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/tikefarerubunexejujim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8103/4917/files/minecraft_gun_resource_pack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4363/2805/files/52657665087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/accounting_aptitude_test_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/90084993323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/diseparewadok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3971/1644/files/kivozarobapupokev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/zelilofeverosowomobad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/book_review_assignment.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 4

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_off000095f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95F2 5800 bytes
SHA-256: 79b2593242cf4b44107ccfbd7875448962e99e084be405e64fa827aa5e20a86c
font_01_sfnt_off0000a975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA975 13404 bytes
SHA-256: ef6a319705ca8bc6686956f83fa4ca4e87b3444c9e0de62515134c1d6bed4f62

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