Malicious PDF — malware analysis report

Static analysis result for SHA-256 075439858c492fe9…

MALICIOUS

PDF

53.2 KB Created: 2020-08-12 22:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6c24e3a8195e89c20a5e629d4a52d20 SHA-1: 2573bc0e915cbdf97d6324c17262c54ef245cc29 SHA-256: 075439858c492fe9051b35bfdbd305fc2d0896317d6e750656ace214e93887a1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with a critical heuristic identifying a redirector to 'ttraff.com' which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'thermocouple calibration pdf' and the malicious URL, suggesting a lure. The presence of many external PDF links, including benign ones on Shopify, indicates a link farm strategy to obscure the malicious destination.

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=thermocouple+calibration+pdf In PDF document text
    • http://files.oakcreekzc.org/uploads/1/3/1/6/131636769/645e755caeb41.pdfIn PDF document text
    • http://files.liminalstudies.com/uploads/1/3/2/8/132814050/47eb6c86882ed8.pdfIn PDF document text
    • http://files.fitupfabrication.com/uploads/1/3/1/4/131453706/9586067.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/1/0434/6957/0198/files/dagala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8558/4792/files/70542744812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/79903467494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/tobarejajibijotob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/caramelization_reaction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/34797271072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/32882087139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/bevacizumab_side_effects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/35889342535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2914/2426/files/56422630514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/69209764289.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 7

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_off00009261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9261 5308 bytes
SHA-256: b7ddce08933be4b32c0a1f7190c2b8e002bac1154c5356acbb3cc8d41287d978
font_01_sfnt_off0000a43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA43F 10424 bytes
SHA-256: 88ed17e0f5b7d900ce6454ec076f187c1474cd66d09e4b87c541265b005e203d

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