Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9d5507c3cb4e5f…

MALICIOUS

PDF

35.1 KB Created: 2020-08-24 11:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25754ca756a769a09596145c904c0350 SHA-1: 90404bc9da34a52799dc247bd2fab094492e365b SHA-256: 3c9d5507c3cb4e5fcc4cff4a9c25d35a0553c2b56b23f2b1cb0dc83a85a615b5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and other embedded URLs, suggesting a lure to external malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to a malicious site, likely for further exploitation or phishing.

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.com/pify?keyword=2014+cadillac+ats+2.+5+performance+parts In PDF document text
    • http://pepem.laurelgrovesc.com/uploads/1/3/1/6/131606490/2648565.pdfIn PDF document text
    • http://files.shopthrillvintage.com/uploads/1/3/1/4/131483281/0102c988c3e.pdfIn PDF document text
    • http://xozum.yellowdoorbandb.com/uploads/1/3/1/4/131406436/9628071.pdfIn PDF document text
    • http://files.frunkpuppyshop.com/uploads/1/3/1/6/131607027/silupit-bavedo-nikezilizof.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/1/0437/6831/6055/files/62177885734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3655/files/velutigezaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7138/0383/files/2016_telugu_panchangam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7401/9740/files/detoxasomupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/17769106063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/56521180157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9468/6376/files/jegaxuziteveti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6221/5324/files/pronouns_worksheets_for_esl_learners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/4572968500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/vorotamagalekogedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/banking_test_papers.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_off00004afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AFA 5776 bytes
SHA-256: 1a301deaa724ceb2bd8bf84587bff1871a6116ed676a6b899da4368733ac2598
font_01_sfnt_off00005e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8E 9676 bytes
SHA-256: 724e66dca526e4bc65b60ce0d049740e43d90bbdcd87b0b4db2db623ecd2bab3

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