Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f85355a14015c8f…

MALICIOUS

PDF

37.1 KB Created: 2020-08-09 03:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e3919e4049af4709386d8041c21244c7 SHA-1: 4e31f3d4193bd831316d5a48f859d3bf50be4ffc SHA-256: 0f85355a14015c8f7d8e7f61a61ec8a973ccdb111025071f8ebad2301b982def
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, contains text related to file conversion ('File pdf to jpg') and the malicious URL, suggesting a lure for users to click through to a potentially harmful site. The ML classifier also strongly indicated maliciousness.

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=file+pdf+to+jpg In PDF document text
    • http://files.kernefc.org/uploads/1/3/1/3/131398113/rirubagove.pdfIn PDF document text
    • http://files.carolinejunkins.com/uploads/1/3/2/6/132682851/melotegok-toramitigof.pdfIn PDF document text
    • http://kekugafo.kappasigmamu.com/uploads/1/3/0/7/130738799/84c68efbaf4562.pdfIn PDF document text
    • http://files.winshipart.com/uploads/1/3/1/4/131437194/7510410.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/1/0437/2155/6117/files/23937513757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitomomuwarusubewikujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7546/0517/files/xaxut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9254/1589/files/vizio_tv_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/88963544492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/pitaruravupobumipozumig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/govejowexiwefexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/baguminitojagomod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0467/3697/files/86386576865.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_off000055fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55FC 4756 bytes
SHA-256: c496863f1beedff5d114b89563d9638867faa5d9de386717323b8fe180c45380
font_01_sfnt_off00006652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6652 9860 bytes
SHA-256: 1e8af8ad1b32a26ee46fac86aa0c7d54da3adb96c3e158926b782d5300fafa70

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