Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c21b57228e9d808…

MALICIOUS

PDF

36.3 KB Created: 2020-08-07 19:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00169259caa7191b8233af083291adeb SHA-1: 6d107859bb8a26e22a2b0547dca81cca8df64497 SHA-256: 7c21b57228e9d808f93a02bf4c693ac6bb5e513ed3d1a3112c92d218d3b33553
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.cc/pify?keyword=skf+linear+bearing+catalogue+pdf', is designed to appear as a legitimate catalogue but redirects to malicious infrastructure. This indicates a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious 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.cc/pify?keyword=skf+linear+bearing+catalogue+pdf In PDF document text
    • http://files.trevelle.com/uploads/1/3/2/6/132682235/4880750.pdfIn PDF document text
    • http://jolure.cowgirlastrologer.com/uploads/1/3/1/4/131409090/79c67866d55f.pdfIn PDF document text
    • http://files.njoylifecoaching.com/uploads/1/3/1/3/131381480/1102247.pdfIn PDF document text
    • http://files.alabamasigmas.org/uploads/1/3/1/3/131380292/2194312.pdfIn PDF document text
    • http://pezuz.alternativecustommillwork.com/uploads/1/3/2/7/132740900/jezujota.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/1/0431/3032/3095/files/nanostructures_and_nanomaterials_synthesis_properties_and_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/tiwowetavevener.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1715/8312/files/85001765073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8907/3062/files/geometric_nonlinear_functional_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/90799582123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4021/0072/files/gilusuweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/30380521645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/97903005223.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_off00004fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEE 5452 bytes
SHA-256: 5aa44056937c3067eb3ab4ecbba5bad76b6a39ef0adcddf3d66d392074f6d16a
font_01_sfnt_off00006287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6287 9964 bytes
SHA-256: 54892efbcb7d48f288ee377d8fcbad068be243ca3b909e8b59a77087966488a5

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