Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf236da5233cec5…

MALICIOUS

PDF

46.0 KB Created: 2020-07-28 11:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc19243e6921933eb1024acbdf0bb818 SHA-1: 61d9e5cf3cd2385c8ac70fb09a4ff9836d11dc82 SHA-256: bcf236da5233cec563f0d1e2e2064ce5274e50bce85b9c96e00eabc69b8aa6fe
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, a common tactic for SEO poisoning or directing users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=world+of+warcraft+vanilla+herbalism+guide', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or heavily obfuscated, preventing a deeper analysis of its specific content beyond the presence of links.

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=world+of+warcraft+vanilla+herbalism+guide In PDF document text
    • http://files.lightenlifewellness.com/uploads/1/3/2/6/132683088/lanenisonufogelu.pdfIn PDF document text
    • http://files.judydeal.com/uploads/1/3/1/1/131164424/tibufe.pdfIn PDF document text
    • http://files.wyattclark.net/uploads/1/3/1/4/131453068/xogadiwagefeji_gatojif_lejoviximitak.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/1/0430/4578/1658/files/65582998419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/78004332874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/dorilufukejaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/vozokinejamuvolamituw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/68862793635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3889/1419/files/9210328873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1678/9927/files/tesikuxogojukageb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/dupikokenuxipotupopap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/lewoderilaponef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/28953537385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/pabunekevav.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 3

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_off000075b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B7 5624 bytes
SHA-256: 3ed34f489daa88404bb66bf932ecbd7054b2c40959e921d645e97e863c97019c
font_01_sfnt_off000088c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C2 9872 bytes
SHA-256: 83ee76898292f3f92f89477526985ab12df6faeadc6f3b35429a81128e9412a1

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