Malicious PDF — malware analysis report

Static analysis result for SHA-256 370d43df1b29726d…

MALICIOUS

PDF

52.0 KB Created: 2020-08-20 20:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f69be1bee0fb3f495d8b9adad7a35885 SHA-1: a64d81151025b99c0805fd6c3a2e45d2ad07f511 SHA-256: 370d43df1b29726d009d03df029487ddcb725ef141e7630d1a4a4e9ae17530be
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=houses+of+parliament+audio+or+guided+tour', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain similar text, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports 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.cc/pify?keyword=houses+of+parliament+audio+or+guided+tour In PDF document text
    • http://files.acgemsny.com/uploads/1/3/1/4/131483662/gevopetok.pdfIn PDF document text
    • http://files.chappellskc.com/uploads/1/3/0/8/130873717/gamanudi-feditigojivi-damezidete-fatosososupu.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/1/0440/5785/4102/files/championship_manager_2008_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/1st_grade_phonics_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3914/2566/files/abscesso_renal_tratamento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0223/8888/files/70146283442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/31683872890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/37475983671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/fifafidopotumome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/75398370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5199/1719/files/92661756905.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 6

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_off00007f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F11 5204 bytes
SHA-256: bbede202212cb5e248d86716e85e8b6bf4d5bff7db0cd70a1237c089d43864ce
font_01_sfnt_off000090aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90AA 10468 bytes
SHA-256: cd81976fe024a00714716c2e4f26b0f53c15402d5bc2e3cd244a6627966eb7ec
font_02_sfnt_off0000b481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB481 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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