Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2e2b074d3bc161…

MALICIOUS

PDF

40.2 KB Created: 2020-09-10 13:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc4af65c6ab5791d5a4c0588dd8ddb14 SHA-1: c640c66fe0bdfb45d2b515f3b199ed8fdc1af69f SHA-256: 9b2e2b074d3bc161617239673c23d8e2e3c9f040be621bf0677dba4304a26008
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though heavily obfuscated, also contains this URL and numerous other links to external PDFs hosted on 'static.usrfiles.com' and other domains, indicating a link farm strategy. The primary malicious URL is used as a lure, likely to download further malware. 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.club/wix?keyword=learn+russian+app+android+free In PDF document text
    • http://zurazo.coulbyglen.com/uploads/1/3/2/8/132814930/6854614.pdfIn PDF document text
    • http://dupabu.jelliegoedhart.com/uploads/1/3/1/3/131380213/mafuvufafejemo-perezapuxanitel-zuzikogerofawi-voxow.pdfIn PDF document text
    • http://files.toddphillipsmusic.com/uploads/1/3/2/3/132302716/volajixotepedu_fevikawadidemij.pdfIn PDF document text
    • http://files.americanprayerforce.com/uploads/1/3/1/0/131071312/gukexevuxoverireru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/9e53d4_f7532e09ac7a4be48bf447682acadd26.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ac1ab_fceccd14bebe4210a1c57cbc088ede2e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9a533beecad245c59d93b09b0b65424e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ced2dc_5b45ae1647044ab38dcff9f90515cd93.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bfd504_17f2539b565447f99d75b20a26497fac.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3eed2b_f3341a54b57749dcadeed54d7f74e62e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8aba0c_2663bece15a04f649e9ba67a614ae953.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/882da0_4108759e63c047eb8e20e908dff4c619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/basic_guitar_chord_diagrams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4655/8106/files/lededukajebuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6775/8997/files/bl2_bone_shredder.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 1

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_off00006155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 4944 bytes
SHA-256: 0ec47970a629539edfb820de821283945186ce292f81eb3319d2c72fb4149163
font_01_sfnt_off0000723d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 9948 bytes
SHA-256: 68512e36a281884a6d8d75dd0a097f82fdb70a625b18235cdc39d9b041757173

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