Malicious PDF — malware analysis report

Static analysis result for SHA-256 f51d6c6427f6c24e…

MALICIOUS

PDF

34.0 KB Created: 2020-08-01 08:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e887eb5f68d4e976f33723ec5e03942 SHA-1: 67f435c0db42be26f2a0856c1a4cda961245131f SHA-256: f51d6c6427f6c24e06f5f1a92725e5018fb332eae9d3f5445713d1ab78a01b43
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a free download for a statistics textbook, but the primary link redirects to malicious infrastructure at ttraff.com. This indicates a phishing or redirection attempt to a malicious site. No scripts were extracted, limiting the analysis of further payload delivery or execution.

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=elementary+statistics+12th+edition+pdf+free+download In PDF document text
    • http://files.drh-artist.com/uploads/1/3/0/9/130969339/vamitesumutobitug.pdfIn PDF document text
    • http://files.jbarneslab.com/uploads/1/3/1/4/131406605/0af900.pdfIn PDF document text
    • http://files.simpsoncsm.org/uploads/1/3/1/3/131379801/5401336.pdfIn PDF document text
    • http://files.radiadoresmm.com/uploads/1/3/0/7/130739340/telabamefewezezaj.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/1/0433/4275/8053/files/pasuzafidub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8594/5246/files/revewonaroxinimema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/38956801613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/20111129725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/26966991717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/95945221804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/temuxuzusipafajoluzomiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/monoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/44567159098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/porawibixupadowidaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/45023286902.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 4

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_off0000472b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x472B 5732 bytes
SHA-256: c5b3da36c032cb93361ebed07b781e85d23ad56430b689f1a4c6efd133a14b6f
font_01_sfnt_off00005a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9D 9472 bytes
SHA-256: 4915738fce51e4f2ad778ede8668d16fb3d7aff029c671a9e01eb1b09142936a

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