Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0c5cf016523f0c…

MALICIOUS

PDF

44.8 KB Created: 2020-09-12 14:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d332ac0160843f2ce744fb80005aef7 SHA-1: f6227b5b60b4a37d90f8c374d2c318727d8ca1a4 SHA-256: 5b0c5cf016523f0c475401272f4d8b7e2caf4963bbe87a99de46eee3deb2bda1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious sites. The document body, though heavily obfuscated, contains a URL that aligns with the detected redirector, likely serving as a lure for users interested in the 'Amelia Earhart movie'. The ML classifier strongly supports the malicious verdict.

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.club/wix?keyword=amelia+earhart+movie In PDF document text
    • http://files.dnaleatherwa.com/uploads/1/3/0/7/130738814/8327209.pdfIn PDF document text
    • http://topog.boostfitness.co.uk/uploads/1/3/1/4/131406798/xereladatutifuvixaf.pdfIn PDF document text
    • http://miwunu.homecompanyservice.com/uploads/1/3/1/4/131406665/39751c.pdfIn PDF document text
    • http://files.brian-amos.com/uploads/1/3/2/6/132695602/geferasivijitepux.pdfIn PDF document text
    • http://files.right-resources.org.uk/uploads/1/3/1/0/131071127/kapuzemutubav.pdfIn 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/48bf55_4ee1b4b850954efea01d35278737a0cb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/299074_2959d7e2867f4951860f87b33b1bde8d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d99ef3_5b4beae018884a8889ca6565647e04f8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/269bb8_547885224f604444801a8ff7bcd52127.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/031dda_db1757ef7106424f908276077c96f87f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/46a5ae_535cc0f64c80452ca0400b5e947e2f1e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4ca7f5_32493ce6dbd8444d8fb93b2da2e43b93.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_off000072c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C2 4796 bytes
SHA-256: 70cbcffb5b6f4aa5cc3fb30481d8dd36f50c378d102eb98a6284375a36fd5570
font_01_sfnt_off000082e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E3 10388 bytes
SHA-256: cf9887464a556cc02c862c1742a105e633e56f1940ae0ab61d1b3054b3309d1d

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