Malicious PDF — malware analysis report

Static analysis result for SHA-256 d274b7148a8415a2…

MALICIOUS

PDF

83.4 KB Created: 2020-09-11 13:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 027de770e370513011377a04f2ababbc SHA-1: a38c8bc54bcdfc0aff12978e78fdf68a112a1a0b SHA-256: d274b7148a8415a263c47da8b1018911d5f5f04c0740de6c98fe7a3f1e7f8aa2
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links designed to redirect users to malicious sites, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The primary lure appears to be a fake download for 'The beatles greatest hits album free'. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=the+beatles+greatest+hits+album+free
    • http://sirekutab.carriewears.com/uploads/1/3/1/3/131384536/6279212.pdf
    • http://sowidiniw.infected.studio/uploads/1/3/2/8/132814838/7518624.pdf
    • http://loxumile.propowerwashingllc.com/uploads/1/3/1/4/131438142/bubotuf_nozuba_pativapo.pdf
    • http://files.berrybrook.us/uploads/1/3/1/4/131414516/dikivosafogil.pdf
    • https://cdn.shopify.com/s/files/1/0428/0634/5895/files/pinnacle_studio_15_free_download.pdf
    • https://static.usrfiles.com/ugd/f1780b_666dde0bc3994bdf98a9a3cbbbfa0bb0.pdf
    • https://static.usrfiles.com/ugd/804ff6_a0732f38fc2d45288902c1f9ce8b7943.pdf
    • https://static.usrfiles.com/ugd/9c8fb9_bb90237a6555496889dea6cccd85f205.pdf
    • https://static.usrfiles.com/ugd/c0b427_dbb4e9d942ce46eaac056a6a8eae77ad.pdf
    • https://static.usrfiles.com/ugd/f55bec_61e00ec64ad8460ea1fd6ba68c9edb55.pdf
    • https://static.usrfiles.com/ugd/576447_ffc14cf1d0e64581adac1eac4ea757ba.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_off0000fd38.bin
8460b0cadc28cdc62ab38ce40f3dcecb6c69a9bd61c18b364ddaeb54b0e03c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD38 5268 bytes
font_01_sfnt_off00010efb.bin
6f10b8476a1f75fc9a5012c0b23ca726113015434e1ebfefbc982926d9c59ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFB 16168 bytes

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