Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64bf8ca28d83c6f…

MALICIOUS

PDF

43.5 KB Created: 2020-08-23 04:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 04bf7367fcfbb331f3945cbaf8ebf246 SHA-1: a4234b7d7e0681fc04db8e640d70930d00b44255 SHA-256: a64bf8ca28d83c6f2c7364f95a129f36350dc1d3e731f17c8be84199a1b2e52a
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination. The ML classifier also strongly flagged this PDF as malicious.

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=bonjour+service+itunes+free In PDF document text
    • http://files.southerncrossbrumbyregistry.org/uploads/1/3/1/4/131406600/6785063.pdfIn PDF document text
    • http://files.mechanismus.net/uploads/1/3/2/6/132681308/leraninaregibud-zenob-pomotewu-jufinovene.pdfIn PDF document text
    • http://sigosi.juliabassart.com/uploads/1/3/0/7/130738943/rekumopovew.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://cdn.shopify.com/s/files/1/0430/4227/5485/files/ap_world_history_study_guide_unit_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/jesagebuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/tifoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9790/6589/files/mozagizalomup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/38328252275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6500/0344/files/luwelevupajofoxul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/kizutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/definition_of_scientific_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7514/0761/files/maxon_cinema_4d_r20_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/434366598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0723/7531/files/faleledovefojadavuguja.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6044 4700 bytes
SHA-256: 31905ce63a164b291d418b5267c567cbd7ab22e3d2af52ab9c221372033700a2
font_01_sfnt_off00007059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7059 10212 bytes
SHA-256: 17cb7631b5b0d3430ae5eb8023940af06c1b19e80371783e0be6a8ec9c0e9958
font_02_sfnt_off0000935e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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