Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5bcb1b8a8ffdab…

MALICIOUS

PDF

45.9 KB Created: 2020-08-02 04:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c6d344906f84805f5a20196363f94551 SHA-1: 833b9e68e9ce03172de7fa4cb5258bb50c8ac80a SHA-256: 4c5bcb1b8a8ffdabea69714afe2a9c8ce21113d8ada67beb4fd649e14f80c596
202 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the payload. It also exhibits characteristics of a link farm, embedding numerous external links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The presence of a 'download' button lure further supports the malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=corporate+finance+3rd+edition+pdf In PDF document text
    • http://files.inzei.tokyo/uploads/1/3/1/8/131856331/walulina_sexawotivega_mejediv_sulixumop.pdfIn PDF document text
    • http://files.athletesrecycle.com/uploads/1/3/0/8/130873894/7662002.pdfIn PDF document text
    • http://files.davesavage.com/uploads/1/3/2/6/132683289/nozijowivuke-depaza-guvewa.pdfIn PDF document text
    • http://files.body-knowledge.com/uploads/1/3/2/6/132681824/2094315.pdfIn PDF document text
    • http://files.leonmccarron.com/uploads/1/3/0/7/130776006/20f37e61bcd34.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/1/0432/2174/5825/files/kalutami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2423/7212/files/31436709130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7700/0611/files/wozepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/vujewibafatejilemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/zerozobusemapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3767/1080/files/79654558385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/zatebomivose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/pezusorila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5382/6726/files/borelemabikitatovixomit.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_off00007656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7656 5008 bytes
SHA-256: a7bd63756f259d0a0cfd1831a3f3e59e71a00ffa12d52af02808f1591a850c72
font_01_sfnt_off00008770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8770 10456 bytes
SHA-256: f856e739a790cacedc4a9f08570a668ba62bd6121759d849bbed39e01d6e9ec2

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