Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ffb635f9ba2d4c…

MALICIOUS

PDF

44.1 KB Created: 2020-09-11 04:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 517c4d0ba5e85a492e92794abf269c6b SHA-1: e710f22cb897873363c2cef1dc0dcf171a8de287 SHA-256: b5ffb635f9ba2d4c2a24774c39e08c26f2d39811cf63f4faff1e312dc4e91a10
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=video+background+remover+for+pc+free'. Additionally, the PDF is identified as a link farm, containing numerous external links, many of which point to benign-looking PDF files hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious redirector URL and other URLs, suggesting a lure to external content. No scripts were extracted from this sample.

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.link/wix?keyword=video+background+remover+for+pc+free In PDF document text
    • http://numepi.angiessoulspace.com/uploads/1/3/2/6/132681670/piwuj.pdfIn PDF document text
    • http://files.davidschagun.com/uploads/1/3/1/8/131871419/fukorulenemoj-vuxovefumil-kiralowato.pdfIn PDF document text
    • http://files.therockwm.com/uploads/1/3/1/8/131856039/b2ef73c869e96.pdfIn PDF document text
    • http://files.judyireneharney.com/uploads/1/3/2/8/132814518/e73b3f.pdfIn PDF document text
    • http://files.kimirose-wherevershegoes.com/uploads/1/3/2/6/132695372/muvogenetuxebog.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/ce5d00_85f2e0a56ffa4e04b2f3c4c4e1f447a2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3de8a6_23874b15125c4e3aba1f7ca819e09cfb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cfbfd2_a74b7ba473644be7bcc421d7aa16b4bf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/0876/8416/files/halfords_power_pack_200_with_compressor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9790/6589/files/mentalism_tricks_mind_reading.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/vevulusevodaguvinevezik.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_off00006eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB3 5492 bytes
SHA-256: 86ff920150e1e8de7f7068e4a18369141d0bd982ddd7bf7cd8f99556565d6c52
font_01_sfnt_off00008160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8160 10224 bytes
SHA-256: 129a5feaefecfad46601cd5505978bb549b6eaa3b3c5a31d2d82c40999c3c213

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