Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb67e4497a9932d…

MALICIOUS

PDF

39.4 KB Created: 2020-07-28 17:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4590359d7dfade9e0633af39e9f8086c SHA-1: 430740d093fb4042811f05f5e4e1c5e52dac28ce SHA-256: cfb67e4497a9932d2b04b63473454299eb654955403014dea438cd2a3f83ffe1
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. Another heuristic flags a direct link to a known malicious redirector. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword related to a PDF document. The document body is heavily obfuscated and does not provide further context.

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=gurps+bunnies+and+burrows+pdf In PDF document text
    • http://files.columbushardscapes.com/uploads/1/3/1/4/131409170/fujawejelaruja.pdfIn PDF document text
    • http://files.independencetelevision.com/uploads/1/3/2/8/132814147/8137547.pdfIn PDF document text
    • http://files.oclegalnews.com/uploads/1/3/1/3/131378771/wefej.pdfIn PDF document text
    • http://files.animalclinicsofthewoodlands.com/uploads/1/3/1/4/131407855/e001eb3.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/1/0429/3538/6275/files/gewitabisopalavaxiwib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/zabefevavudixatudizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9122/0887/files/5963009414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9649/0655/files/1708939273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/vadimelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/98855057761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/zezopixonow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1917/9931/files/24509462822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/65638752776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/20254182686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/dalowoliweja.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 7

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_off00005c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C32 5068 bytes
SHA-256: dadb855f8ad3f430eaf92d6f1622deb20a045852dcc9dca5187e5fce5766ae4a
font_01_sfnt_off00006d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D89 10348 bytes
SHA-256: 8af28b43d52c176e174c84bbee6e3268216e0567464c58d2d322839581f0a1d8

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