Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c8860f0a585851…

MALICIOUS

PDF

36.9 KB Created: 2020-08-26 02:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fdb0dad38db5dc1c6d3dd7ba465ee3a0 SHA-1: 5f32f79b89bebf4ad053c6a09814f532c79d0295 SHA-256: b4c8860f0a5858511c16cc9646e445af078d879bd7265aad4516fee7345c26a6
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=download+adobe+digital+editions+2.0.1', is flagged as a known malicious redirector. The document body also contains garbled text alongside this URL, suggesting an attempt to disguise or obfuscate the malicious intent. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to distribute the malicious payload. 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=download+adobe+digital+editions+2.0.1 In PDF document text
    • http://texisiwe.curbsidecake.com/uploads/1/3/2/6/132695492/3389e83dc6ce7.pdfIn PDF document text
    • http://dofajut.mattmonfettlaxcamp.com/uploads/1/3/2/6/132696067/2390608.pdfIn PDF document text
    • http://vuwepokij.destinationsbyjudy.com/uploads/1/3/0/7/130738667/lupir_lasujeluvurab.pdfIn PDF document text
    • http://vusug.figsofwake.org/uploads/1/3/2/8/132814930/3390182.pdfIn PDF document text
    • https://www.adoIn 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/1/0429/3168/3484/files/letewedudof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/cisco_jabber_for_windows_planning_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6391/8246/files/demon_hunter_season_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/54810668887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/ballina_rsl_entertainment_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/43140753342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2724/2903/files/24905648057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/reading_skills_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/vudewefubet.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 6

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_off00004f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F72 5484 bytes
SHA-256: b66610c6909da501525adc85392395a3a51cf9749a2a51fa3495d028c329079c
font_01_sfnt_off0000624b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624B 10648 bytes
SHA-256: 410b024870c137f65b2ef37806916c7e51cb04e8575f51455ac950b0db7a89e5

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