Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f4c6b3f9159073…

MALICIOUS

PDF

53.2 KB Created: 2020-08-01 22:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 461fb540edc6fcbfcac410d53b8e35d2 SHA-1: 57c02c2b7752800a502c63ac3fca99095064f022 SHA-256: a5f4c6b3f9159073a7b5fc4326b7db13c30906685d6ef30a581b44049a9bb884
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=mechanics+of+materials+8th+edition+pdf'. The document body, though heavily obfuscated, contains text related to 'Mechanics of materials 8th edition pdf', suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector.

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=mechanics+of+materials+8th+edition+pdf In PDF document text
    • http://files.watsonhill.com/uploads/1/3/0/7/130738621/wisezawu.pdfIn PDF document text
    • http://files.udderlygorgeous.com/uploads/1/3/2/6/132681826/kekojuzakidegutew.pdfIn PDF document text
    • http://files.ginaniebergall.com/uploads/1/3/1/4/131453633/likowiwekurogelukadi.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/1/0433/4062/8133/files/16235922513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/mavudifajorazowax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekerumukin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/61045813552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/41437207892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/tinuxafafiporafapoxikez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/xetajizedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/wodoterukegesiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/xavefegugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6794/9724/files/24445289624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/biwuvakurivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/76408514438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/sivaxevekidukesexudutal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/fijavewufezixepuw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9181 5592 bytes
SHA-256: 9458739f79e310f986118b47e76ac346f5b540836bf3620d1cef7821ee8b3033
font_01_sfnt_off0000a46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA46A 10284 bytes
SHA-256: 572fcdcc66beaebe90f978dc550c60a033705c5f72274a096edcbae0cc94e2e3

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