Malicious PDF — malware analysis report

Static analysis result for SHA-256 af91f91bc7934bc0…

MALICIOUS

PDF

41.5 KB Created: 2020-08-22 08:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d6a6689c28aa72e7d7e06f44d38e4bdf SHA-1: e4630b9f34bacf7dcb305ebe2fe969e1bbc26ece SHA-256: af91f91bc7934bc0faf552de2db55a9577b5ddcf9c6cc94164b30096c6cd0291
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.cc'. This link is presented in the document body with a lure related to 'company logo design free'. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or distribution mechanism. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

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.cc/pify?keyword=company+logo+design+free In PDF document text
    • http://files.lennoxwellness.com/uploads/1/3/2/8/132814030/e382224a0.pdfIn PDF document text
    • http://files.glitterbarnchicks.com/uploads/1/3/2/6/132695492/buwefikegigu.pdfIn PDF document text
    • http://files.heartstringscounseling.com/uploads/1/3/1/3/131380759/vewulogunegesanu.pdfIn PDF document text
    • http://files.lampworkbeadsandsilver.com/uploads/1/3/2/8/132814680/632129.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/1/0432/3255/9267/files/74145630035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5484/5352/files/hotel_california_uke_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6929/3215/files/79980392015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/27925938530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/aprendizaje_vicario_psicologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/84142225488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/26701040699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/sepsis_guidelines_2020_jama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/nutixibozogerumisaburokag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/razoxesafuwodinaruji.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 3

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_off0000644c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644C 5368 bytes
SHA-256: 8723036129fa352cb41b03f225704452a64d9720915d4c752ec4daf22e45c1bd
font_01_sfnt_off00007677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7677 10292 bytes
SHA-256: f19f8e64512aabc16bfafe47fbecfb0b1d0a0cee20948202d65b9cbff2d297b7

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