Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ac912ea466d347…

MALICIOUS

PDF

38.8 KB Created: 2020-08-06 01:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2fbc2b6fb064bdb3ee9c5a99728c6fb9 SHA-1: 10d0efbafa113f8a44b0d8611ce248538353a798 SHA-256: c9ac912ea466d347cf77d4c2c942803a40159f573f5bb6ca3020696856e84c2d
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'ttraff.ru'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The primary attack pattern involves redirecting users to potentially harmful sites.

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=monitoring+evaluation+and+learning+framework+pdf In PDF document text
    • http://files.drgordonself.com/uploads/1/3/2/7/132740350/xokojaguvuviger.pdfIn PDF document text
    • http://files.crescentmortgagecompany.com/uploads/1/3/0/7/130739892/temilub_nirobumokujizet_vekufo_buzilozerunuv.pdfIn PDF document text
    • http://files.hlfmgoats.com/uploads/1/3/1/3/131383553/jopaxubesoz.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/1/0428/2623/6063/files/el_embarazo_adolescente.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/vadakuzebidowusowizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8938/7939/files/javixoxetonevilivakibozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/71121306313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/zurileleritedud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/ohsas_18001_manual_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1689/6159/files/tuziret.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/77638911070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/63224544467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/fugojevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/76035360610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6369/6805/files/2577322566.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_off000059af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59AF 5404 bytes
SHA-256: a88549cab1e1ed76420e76b542d61c0a0df0fd0b9959a671ca9667daba19dfc7
font_01_sfnt_off00006c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C23 9976 bytes
SHA-256: f0dc86a99620f206400b71d981c7a3df6b5d7f2d6f2e7e56e92b62be6e66e038

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