Malicious PDF — malware analysis report

Static analysis result for SHA-256 671b65e1efd870d6…

MALICIOUS

PDF

40.4 KB Created: 2020-08-24 12:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4296f00367b694cb5ad849a3faa5d43e SHA-1: b16814a38b3b63869e328349d717c0ef4312fa6c SHA-256: 671b65e1efd870d6bad4b7416e136876a490b4028a5dc5fd99fcf68dab038fde
194 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a URL associated with malicious redirector infrastructure, specifically disguised as "annual payroll tax forms". The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same lure text and the malicious redirector URL, suggesting an attempt to trick the user into clicking the link for phishing or scam purposes.

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=annual+payroll+tax+forms In PDF document text
    • http://walegegut.jessicaohanley.com/uploads/1/3/0/7/130775374/tiwikanadigekezovi.pdfIn PDF document text
    • http://files.borderskirental.com/uploads/1/3/1/3/131379833/lemuw.pdfIn PDF document text
    • http://files.daphnefatterphd.com/uploads/1/3/1/6/131636957/a96824f4.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/1/0435/7141/3155/files/7097519067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/2579831203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5984/6051/files/aci_sp_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0449/1936/files/60378641450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/bapalujuzapobujojuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7180/6366/files/corpse_bride_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/e_bildirge_ifre_formu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3788/8410/files/pulse_code_modulation_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3026/5511/files/30883582472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2316/1768/files/sinubufevav.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 8

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_off00005ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC1 5204 bytes
SHA-256: f55680cee4efe2b5fe0297e92a44abff5b1ce2fab533532839be390b7b7cb5d4
font_01_sfnt_off0000706e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 10980 bytes
SHA-256: ecd3495469a90d799386c085ad345baa41d263d968d064c57ddfa8b3b6e78b90

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