Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f4ef7b8cb24d3e…

MALICIOUS

PDF

40.5 KB Created: 2020-08-23 20:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b403e782ebd012a7c1336c5dda00b0a SHA-1: 6acda6cf6f82a1938c324cbbe0995e14857c9b8c SHA-256: f0f4ef7b8cb24d3e59f13e115b24fb1d83b9d82db7c54e5bf3f89cc6522f553b
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'believer music video free'. The PDF also contains a large number of external links, as noted by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection strategy. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=believer+music+video+free In PDF document text
    • http://files.mickeyshikingsticks.com/uploads/1/3/2/8/132815123/koxobevil-jenumeze-rokimavaz.pdfIn PDF document text
    • http://mumilusal.mzladylox.com/uploads/1/3/0/7/130776436/vufobuxulilazix_bidijazo_pomepuwaluvir.pdfIn PDF document text
    • http://files.madaassoc.org/uploads/1/3/0/8/130874655/jigumimitigatotadum.pdfIn PDF document text
    • http://pofarexeb.fastidiousautomation.com/uploads/1/3/1/8/131856746/timixisixoxex.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/1/0431/6889/1040/files/gugopejidakevudex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/86459958418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7293/6341/files/45006188567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1498/7682/files/neonatal_sepsis_treatment_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0905/6666/files/raruxudikovugasixon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1591/2098/files/87472529436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/19442034014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/borbaad_all_songs.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
🗂 Part of campaign: madaassoc.org 5 samples

Related samples 5

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_off000061dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DC 5068 bytes
SHA-256: 1ed66d99a8616a1d6124d3d6f480118f7a3eda0c0f50710c2dd6695aa578f8cd
font_01_sfnt_off00007306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 10088 bytes
SHA-256: ffe893809d4b4c466bd1f6e8e4442241162c29d01bb911af1dc2ff6fe4d71262

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