Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1d4b51bf5861e9…

MALICIOUS

PDF

33.8 KB Created: 2020-08-09 04:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4078138a0115faf49a6001caba5bb2d SHA-1: 0405eb450315f81daf1b44f83b4ba9b82880855b SHA-256: fe1d4b51bf5861e9521aafb3b3baebb87849d3d9a07b765a5c21403b60ed90a3
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious URL identified is ttraff.com, which is known to host malicious content. The document body contains a mix of seemingly random text and embedded URLs, suggesting an attempt to disguise the malicious intent. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=believer+imagine+dragons+guitar+pdf
    • http://files.ebfisher.com/uploads/1/3/1/4/131483147/piruvibili-togemewekubeki-zepasiko.pdf
    • http://files.dregerracing.com/uploads/1/3/1/6/131606951/xexasuxuvonisagexeju.pdf
    • http://files.loxsalonva.com/uploads/1/3/2/6/132682106/dumapukis_rawokunata_lowasid.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3137/files/wekotokakapelefit.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/applied_nonsingular_astrodynamics.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/16997038103.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/tozogubed.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/biodegradation_of_xenobiotics.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/3312629403.pdf
    • https://cdn.shopify.com/s/files/1/0429/8260/4963/files/sarumorojazimixuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/lanudufekakukugulag.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9445/files/41624685061.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/mobubuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/jegakolivaxikizegexemeta.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/fatevu.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_off00004730.bin
1d0ede1bb845d20c5feb471af4bf9a03e18f316069e7a3dd66541278f6a7744e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4730 5472 bytes
font_01_sfnt_off000059c0.bin
f3e17362c18bd9fff63d8fda22a49874da182a853c7d6329d7798637c3fbff03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C0 9620 bytes

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