Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6305d21deadc3d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-10 00:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0352ffecef026bb513cdd379e8fc6684 SHA-1: d3423d2d1677906550e6323bc761e86456b5330d SHA-256: 4f6305d21deadc3d3fe57ac64be04294bc67d22dafe175424df5d873c6e3b3cd
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for a technical document. The primary malicious URL identified is ttraff.com, which redirects to other content. The presence of a link farm suggests an attempt to game search engines for broader reach.

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.com/pify?keyword=autodesk+vault+2020+handbuch+pdf In PDF document text
    • http://files.jakekalender.com/uploads/1/3/1/4/131406506/sijijifub-labikaris-xobajixurise-bonewepidel.pdfIn PDF document text
    • http://files.initiatorum.org/uploads/1/3/0/8/130873732/mudobatoxes.pdfIn PDF document text
    • http://files.longbeachjunkremoval.org/uploads/1/3/2/3/132302998/garojivorowulep-kupewol-minipipiba-jokovufajolig.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/1/0427/9074/8316/files/petud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/dunaxopixelebofeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5802/6904/files/49100078480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/mudadajobudamefuxakenefov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/66844777596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6229/6725/files/viwinivugoxazukelan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/xogadeturotaxapunosimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/silipobefozadonalajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/nokemajixipi.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_off0000659c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 5672 bytes
SHA-256: c89eb1163109c915b98084f8a4ec01ab556ae165d5e6bfc9812a1622f5a70f5c
font_01_sfnt_off000078f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F2 10288 bytes
SHA-256: 39f6d8228358a5d2cc3b0835d9f3e94c2a792f9235f51612f7b0853f63d798eb

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