Malicious PDF — malware analysis report

Static analysis result for SHA-256 169683f4ac2d7784…

MALICIOUS

PDF

46.6 KB Created: 2020-07-29 15:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a5c738f944cdf7468962d53e8bfcaad SHA-1: e02b0a8050b0be760eacd4f4e0f842ca1ea0383b SHA-256: 169683f4ac2d778412f0e8e0186ad0915208c17e96c29efdfc0c8d494f832b36
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to an SEO redirector, specifically `https://ttraff.ru/pify?keyword=ce+certification+standards+pdf`, which is flagged as malicious. This indicates a phishing or scam attempt disguised as a legitimate download. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=ce+certification+standards+pdf In PDF document text
    • http://files.jimdarow.com/uploads/1/3/1/8/131856655/wivegaradifugagub.pdfIn PDF document text
    • http://files.shockentertainmentinc.com/uploads/1/3/1/8/131871994/1971917.pdfIn PDF document text
    • http://files.stpetersnsdunboyne.com/uploads/1/3/1/1/131164479/zovesasegorejumajeke.pdfIn PDF document text
    • http://files.fbtvmin.net/uploads/1/3/2/3/132302710/nutivanugejeruwota.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/1/0430/6799/8362/files/34007983127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/bapivadubulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3258/2056/files/45075271756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/70922692637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/pejeboxusivuxurexaxexunok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9043/5495/files/zokedixuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/24828128558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/10283601675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0239/5798/files/kabozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/dafosivug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41877136991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/tinuxafafiporafapoxikez.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_off0000783b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783B 4928 bytes
SHA-256: 6bd2e980d40a0c640ec8c05099f3315d0efdab97cdcc42980ff3efdd71742510
font_01_sfnt_off000088ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FF 10412 bytes
SHA-256: 0b493c25d113d7d15208620299fdfd1a8f9037be6d5aec70b3c0963005c22c69

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