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)
MD5: 517c4d0ba5e85a492e92794abf269c6b SHA-1: e710f22cb897873363c2cef1dc0dcf171a8de287 SHA-256: b5ffb635f9ba2d4c2a24774c39e08c26f2d39811cf63f4faff1e312dc4e91a10
120 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.

Heuristics 3

  • 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.
  • 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
    • http://numepi.angiessoulspace.com/uploads/1/3/2/6/132681670/piwuj.pdf
    • http://files.davidschagun.com/uploads/1/3/1/8/131871419/fukorulenemoj-vuxovefumil-kiralowato.pdf
    • http://files.therockwm.com/uploads/1/3/1/8/131856039/b2ef73c869e96.pdf
    • http://files.judyireneharney.com/uploads/1/3/2/8/132814518/e73b3f.pdf
    • http://files.kimirose-wherevershegoes.com/uploads/1/3/2/6/132695372/muvogenetuxebog.pdf
    • https://static.usrfiles.com/ugd/ce5d00_85f2e0a56ffa4e04b2f3c4c4e1f447a2.pdf
    • https://static.usrfiles.com/ugd/3de8a6_23874b15125c4e3aba1f7ca819e09cfb.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_a74b7ba473644be7bcc421d7aa16b4bf.pdf
    • https://cdn.shopify.com/s/files/1/0469/0876/8416/files/halfords_power_pack_200_with_compressor.pdf
    • https://cdn.shopify.com/s/files/1/0433/9790/6589/files/mentalism_tricks_mind_reading.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/vevulusevodaguvinevezik.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eb3.bin
86ff920150e1e8de7f7068e4a18369141d0bd982ddd7bf7cd8f99556565d6c52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB3 5492 bytes
font_01_sfnt_off00008160.bin
129a5feaefecfad46601cd5505978bb549b6eaa3b3c5a31d2d82c40999c3c213		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8160 10224 bytes

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