Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccfe1d949525494…

MALICIOUS

PDF

39.0 KB Created: 2020-09-04 03:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74e5aa56860f543664c203b6df6bd27b SHA-1: 280fd9e5b6d9b065e943d777e1078177dc7f8151 SHA-256: 5ccfe1d9495254942f0f1c2d148b38dbf59d30379672482da01f7f254af328f0
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains embedded links that lead to a malicious redirector, disguised as a Chrome app update. The document body and heuristics indicate a social engineering lure to install a browser extension or update, a common path for malware delivery. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=chrome+app+update In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/3b47cb_bc8032b6ba474ad9a5e32072dbc9d81d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ecb7db2ebfd14b9392d61fde998c4381.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_169ef3c8b5bf44cd98003b3c48c365e9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/54fa57_413333a8921549faa5fbd9f5b5bfcff5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/26938b_001366a7a7584f4b9b57d2f3f8a2bb2e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ef253e_95c74e0ac0bf4df2a9722eb11207eff5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/493135_c244a20c819747c7bbf873e36524a6fe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/dazagiruzotopixixoleze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1024/5286/files/68379147980.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/66c878_16f5e7a6e4f749fda121b197d5121f62.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6260fe_5b2eab4d2eaf457ab349719a644a3149.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_off00005c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C72 4892 bytes
SHA-256: dc85affbe204c86568699d2381cd217a5cf816f4d5955bed0d5114faf9f42420
font_01_sfnt_off00006cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDE 10192 bytes
SHA-256: 82d7e6ee8d662a792698be437e42d892b5c7f4479440051f170241ddfb81bc6f

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