Malicious PDF — malware analysis report

Static analysis result for SHA-256 376d73196c79964b…

MALICIOUS

PDF

35.8 KB Created: 2020-08-01 11:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 945055ad95a21b6ec67e70a232644d60 SHA-1: 9da63cbde507d972476316f80dda26c90acbc0b9 SHA-256: 376d73196c79964be00c609cccd4c8c54df8d15beb99c7d5498233c86b911b7f
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDFs, indicating a link farm for SEO manipulation or redirection. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The document body contains garbled text but also includes the target URL and references to other PDFs, reinforcing the link farm and redirection attack pattern.

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=1998+road+king In PDF document text
    • http://files.gdni.biz/uploads/1/3/0/7/130739351/8290443.pdfIn PDF document text
    • http://files.classoraclemedia.com/uploads/1/3/2/7/132710783/b30c6821e1b2be.pdfIn PDF document text
    • http://files.msilaser.com/uploads/1/3/0/9/130969742/9305691.pdfIn PDF document text
    • http://files.horleycricketclub.co.uk/uploads/1/3/0/9/130969430/8783859.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/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/3gp_movies_com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/74188678294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/13114072804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/21801649833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vozazugimutiwobawaxuleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/sikoxub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/ferekugakujiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/33577263989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2346/5623/files/xorokipisatokafedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/godakisuniwugulideko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/pikisumoraruxobowe.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_off00004f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F22 5152 bytes
SHA-256: a0d26331dd4fe8237e0178e36ebfa7227cb043ebd535d2850de96c96ad14dc2f
font_01_sfnt_off000060c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C0 9860 bytes
SHA-256: 7998e60017e5672cbcf874f047f32afc630322182e73b7c673e8564c1de87598

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