Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a79f0a7bccba43…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 22:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e4f4c7436ce3ed3ad8483cc73d9a707 SHA-1: 2c1f31d1976a24474e375321a99f5c2fcaa0db23 SHA-256: a7a79f0a7bccba438d5610aea2c729bc24835c9131115514aff6f197cce29f97
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=categories+of+computer+pdf, which is part of a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains this URL and other links pointing to various PDF files, suggesting a lure or a method to distribute further malicious content. No scripts were extracted from this sample.

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=categories+of+computer+pdf In PDF document text
    • http://files.hawkeyeequipment.ca/uploads/1/3/1/6/131606261/dibinakeb-mazarerad-wakune-fisorigovikog.pdfIn PDF document text
    • http://files.vasalou.net/uploads/1/3/0/7/130738559/6b053f9f7df.pdfIn PDF document text
    • http://jamur.tahoesacredvows.com/uploads/1/3/1/6/131637419/5642726.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/1/0434/4440/4374/files/investment_banking_terms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6890/0006/files/20715052490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/maxon_cinema_4d_r20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/72343459691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/zuxogegokovug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/41151971976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/wumibifakoredabevoguv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/40383938593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/novupuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevedizulav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/91940422890.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 4

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_off0000613d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 5348 bytes
SHA-256: c126f793ebe6fddaff3ae878a8934886c0ff94cf4cbcf95e41265ac41bbdf636
font_01_sfnt_off0000735c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735C 9964 bytes
SHA-256: 2b1520e881c2c82219849e4c187f2e852fcd7dab7532e38b628dc3e27ea8b0cc

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