Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f8e4d6fb9bd4791…

MALICIOUS

PDF

40.7 KB Created: 2020-08-05 23:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f9bcec341a9a20b57addedac7ad1cb0 SHA-1: 1a51f68235c4ccf7499ab87eb6f881bdfdbb86b0 SHA-256: 5f8e4d6fb9bd47912e945a9413dd775c727c5e5827976be32e9588c8011e4fad
194 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=aptitude+test+for+freshers+with+answers+pdf+download`, which is flagged as malicious. The document body also contains this URL, suggesting it's a lure for users to download a fake aptitude test. The presence of a large number of external PDF links, many pointing to Shopify domains, indicates a link farm designed to improve SEO for malicious content. The ML classifier strongly indicates 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=aptitude+test+for+freshers+with+answers+pdf+download In PDF document text
    • http://files.triplechomestead.net/uploads/1/3/0/7/130739379/fizijugel.pdfIn PDF document text
    • http://files.jandrexler.com/uploads/1/3/1/3/131380083/649d34cf463.pdfIn PDF document text
    • http://govobosa.radicleelements.ca/uploads/1/3/0/8/130814124/87d1c96e.pdfIn PDF document text
    • http://files.americanmadeexotics.com/uploads/1/3/1/3/131384400/7165702.pdfIn PDF document text
    • http://files.bigsandlakepoa.org/uploads/1/3/2/6/132680874/denara.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/1/0431/6558/1468/files/bimunajamovuzuviforejoxav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7967/9646/files/dowitokuvemozefuzejob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/tiganosivixifimematodom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5475/0106/files/kidimakizofibanigejaxar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/xuxurufimejaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/94864236108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/jemibeborinugujejuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/55609580654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/81691050315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2599/5688/files/volkswagen_beetle_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/45517044450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/moborizer.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 3

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_off000060eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EB 5208 bytes
SHA-256: 5fdaf51aa08ee48ade994d6944a230b5bd54f14574dd0907b840e2f2927870ca
font_01_sfnt_off000072b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B3 10200 bytes
SHA-256: 57578f2ceeefeb884b9239ac2baa3868f1e366e88725c1601515f48dc1bc6972

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