Malicious PDF — malware analysis report

Static analysis result for SHA-256 3184cf8ff81ad5e3…

MALICIOUS

PDF

33.5 KB Created: 2020-09-18 06:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f3b0b4810ec2c83a4754ea68ef13403 SHA-1: d48a646f4601d004b7443dedaa6cdd182bbf58b0 SHA-256: 3184cf8ff81ad5e362cf408a905076552a684afa4116c757f39ecff2a82c3cf8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One prominent URL, 'https://ttraff.club/wix?keyword=the+skeletal+and+muscular+systems+crossword+answers', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same topic, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.club/wix?keyword=the+skeletal+and+muscular+systems+crossword+answers
    • http://files.noelkawano.com/uploads/1/3/1/6/131606257/0193d8c7dbdb.pdf
    • http://kegelab.sharonstaffordmetals.com/uploads/1/3/1/4/131453541/8e2b90754b.pdf
    • http://bunuv.maxblackphotos.com/uploads/1/3/0/7/130776769/lavakafi.pdf
    • http://totidan.comledcenter.com/uploads/1/3/0/8/130814070/bafonavadav.pdf
    • http://wivupafel.fatherbrowning.com/uploads/1/3/1/8/131856331/4826230.pdf
    • http://magaja.annajeansalon.com/uploads/1/3/1/4/131407014/xapuke_tapawewisotal.pdf
    • http://sumamed.heleneathanasiadis.com/uploads/1/3/1/6/131636948/desovofawix_sokozekoke.pdf
    • https://03263d72-f8f8-46cd-9477-aaf37e0fa6e8.filesusr.com/ugd/2eec94_5f15b9d9864648609603897234ac08b3.pdf?index=true
    • https://47e6c2a1-3ff1-48b4-afe7-3a8c1ed830fe.filesusr.com/ugd/0baf77_289df96767f34de1861a72fac6da2c1f.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/stokes_field_guide_to_bird_songs_eastern_region.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/feluvisifuvepotunod.pdf
    • https://cdn.shopify.com/s/files/1/0437/8624/0162/files/alginato_de_calcio_en_heridas.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_off000047a2.bin
0b4052b39bea8b54bb917b022cfafc27945a40ebec6cf979ef7dc1bd8a78b130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47A2 5384 bytes
font_01_sfnt_off000059da.bin
1d32474373125881f95df24bc733786aa9a5e3cadfd94d3cfd3b8475948eeea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DA 9176 bytes

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