Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a68f2e76f2ee0a…

MALICIOUS

PDF

46.0 KB Created: 2020-08-03 09:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac08ecca56fadeb4b0b25f8944fe0e0f SHA-1: b6829b73b966e906a55f6e1a97186f09ba0d19ae SHA-256: a2a68f2e76f2ee0afa1e08619ab5fa0d142cacb0693904229a513cc108213e3c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at https://ttraff.cc/pify?keyword=raven+shield+mods. The document body, though heavily obfuscated, also contains this URL and a large number of other URLs hosted on cdn.shopify.com, suggesting a link farm or redirection strategy. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=raven+shield+mods
    • http://files.victorystrengthandfitness.net/uploads/1/3/1/3/131379111/3189598c68fd.pdf
    • http://venir.saltcitymentalhealth.com/uploads/1/3/1/4/131437792/tifizojoj_numafijim.pdf
    • http://files.poetriinmotion.com/uploads/1/3/2/7/132710712/8119661.pdf
    • http://files.sandytoessociety.org/uploads/1/3/2/8/132815015/galukosenasa.pdf
    • http://files.authoramyrichie.com/uploads/1/3/1/8/131856310/muvikutivuburafimuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/joxabamazodojomigodoja.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/mavodisusanu.pdf
    • https://cdn.shopify.com/s/files/1/0449/8512/2984/files/gta_5_ps3_cheat_codes.pdf
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/52582328362.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0293/files/94636243385.pdf
    • https://cdn.shopify.com/s/files/1/0430/7186/4993/files/pabukamosutudiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/71551519525.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/semirezutolujufifuzodo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8919/files/14942942108.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/39106351985.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/mozixutuluzo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/vasebine.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7969/files/cub_cadet_1200.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13164506765.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_off000075ee.bin
486fbda34d5f4b77107e096d380e350d50fe8249587bb53b5a77cd54af96b6a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EE 5036 bytes
font_01_sfnt_off000086f4.bin
a11c758874ed3b16c8d43600f44113c302a9c21aa8904ce246346e9493a801d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F4 10576 bytes

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