Malicious PDF — malware analysis report

Static analysis result for SHA-256 77253d4e8a88d066…

MALICIOUS

PDF

41.7 KB Created: 2020-08-05 08:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d5f41a4573024ad55d4b1c1a3b9c9d7 SHA-1: ff96985f2e463aaac6a0a131e42cd5f126246b82 SHA-256: 77253d4e8a88d0661c053dfabf0b11a5f453d7c34a64f3c1b60cdc21b13d74f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm and a redirector URL, suggesting a phishing or scam attempt to trick users into downloading further content. The ML classifier strongly indicates maliciousness, and the presence of multiple external links points towards an SEO-based lure for potentially malicious downloads.

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=ccda+exam+questions+pdf In PDF document text
    • http://files.scsalc.org/uploads/1/3/1/0/131070576/madixapukakosut.pdfIn PDF document text
    • http://files.sukhi.no/uploads/1/3/2/6/132681210/4786180.pdfIn PDF document text
    • http://files.eternaltimberanddesign.com/uploads/1/3/0/8/130814014/josesafewe.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/1/0432/2505/5389/files/54872188335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/witupitotusitewuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/13247228699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/witume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/12003541080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/83781168847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6981/7511/files/71117563033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7103/6823/files/71020702059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/fowulokutelubap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/webukefuke.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_off000061e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E3 5272 bytes
SHA-256: a4b557f4655669b5636daf2809074d77e0d3542d59425a19763706f05a0374eb
font_01_sfnt_off000073c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C7 11164 bytes
SHA-256: 7a9a146fd6c6f931f78149251a14dd48b824a188441f43738a81babbb4b9cc4c

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