Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf17b8ad40575dc…

MALICIOUS

PDF

39.3 KB Created: 2020-07-28 01:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f1a5f4f884d8e71ff25b8b19d563fe7 SHA-1: 6ac12a2f75778ae2e106d7a129e47ba5c0d0b0fd SHA-256: dbf17b8ad40575dc205f4c46d16d8f7f1c1233afcbc452c0676107b1c2cf2ed5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector pointing to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, with one of the first URLs being 'cdn.shopify.com/s/files/1/0433/8538/9206/files/xetuvikidufosaluruja.pdf'. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains text related to 'solving multi step inequalities worksheet answer key', suggesting a lure to disguise the malicious intent.

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=solving+multi+step+inequalities+worksheet+answer+key In PDF document text
    • http://files.athleathan.com/uploads/1/3/1/3/131381640/merokulu-kerojijaduw-ruwifuxetaxeda.pdfIn PDF document text
    • http://files.thebucolicyogi.com/uploads/1/3/0/7/130776204/1607788.pdfIn PDF document text
    • http://files.henricobar.org/uploads/1/3/1/3/131381422/wodutifu.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/1/0433/8538/9206/files/xetuvikidufosaluruja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/84181026526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/dimefawivenolofukagep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/48926163684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/12427649623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/pogarojanuruzameguzogipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/kosekizoxudizena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/3177492625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/30247422421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/xelonunepifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/64031932375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/59679811787.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 5

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_off00005da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA9 5664 bytes
SHA-256: 6ee6791f17588a012ec03ba23ccc7c8ea1405412c0588c25f2a6d1bcd1e8d259
font_01_sfnt_off000070d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D4 9088 bytes
SHA-256: 8f00677d5c203efc3c2941f257abebc7833d37917c933b494e24344a0cee5fb1

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