Malicious PDF — malware analysis report

Static analysis result for SHA-256 351cc7aea32ca507…

MALICIOUS

PDF

43.4 KB Created: 2020-09-09 14:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4f24adb291a228a3965221d2951c3d4 SHA-1: 62dd78af7f4bcedd1455a8ab6d52a21b954bcc28 SHA-256: 351cc7aea32ca50746d4abb88bd02059f70cd5d8c7222dff6184ae73a032fbfd
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.me). This indicates a link farm designed to obscure the ultimate destination and potentially lead users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated.

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.me/pify?keyword=chromolith+performance+rp-+18e In PDF document text
    • http://files.athenscountystorage.com/uploads/1/3/1/4/131410812/fb11663c9.pdfIn PDF document text
    • http://files.mathewmadlyn.com/uploads/1/3/1/8/131858108/lawofitopoge.pdfIn PDF document text
    • http://files.chantellefashion.co.uk/uploads/1/3/1/6/131606923/tekiguxatimepa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/7f5dc5_7ae39a3c14034d76ae6e354f4849c249.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c068f8_5ab4f3b5589a4a3997c354e015db7837.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f68081_e340ed17130c4dbca646bd9cdfd0e6ba.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7ea8bb_62e9d66b6f53412f8ee14c2fe8a0d8f2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6240f8_42e988e7567a42beaf97826d304d84b9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f8cc68935adc467fb3a9019a5b0e1e85.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d01287_a9777de2778443dd9b34b57cc5c06d32.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a640e9_83f76404dfd948f9ab5311d933655d9b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/ralorejumigikiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2227/7032/files/fimodubazizulagepim.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6E 5588 bytes
SHA-256: 524f620f4a24575bdde408211e5fac2aaaefae221bf25147fef4e79b46f6b860
font_01_sfnt_off00005f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F01 5164 bytes
SHA-256: 107587a64b7ff5fb316475fb8a564a087cf5026871f88a854cde7ca5af3d87f9
font_02_sfnt_off00007070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7070 9956 bytes
SHA-256: 073943e49b3a2878f97934027c47eb8ff0722338df7977aca04c5b817f56c4b0
font_03_sfnt_off00009240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9240 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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