Malicious PDF — malware analysis report

Static analysis result for SHA-256 44fa9a03fb2dadbe…

MALICIOUS

PDF

41.6 KB Created: 2020-08-02 05:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a77eee8621d93c5d2686f97cd7eea1ba SHA-1: 2028178b2bb4bd130a341c7acef33d3b4d51608f SHA-256: 44fa9a03fb2dadbe7ac62d645ce01258b504b7a21b10071886294c5264b66549
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link pointing to `https://ttraff.ru/pify?keyword=free+gunsmithing+pdf`. This indicates a social engineering attempt to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links and the redirector strongly suggest a phishing or malware delivery attempt.

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=free+gunsmithing+pdf
    • http://files.wctohio.com/uploads/1/3/1/3/131383838/7552629.pdf
    • http://files.laviishluxxe.com/uploads/1/3/0/9/130969356/1636614.pdf
    • http://files.elizabethbaumanart.com/uploads/1/3/0/7/130738914/zusowobupiz_retanupaduwuvum.pdf
    • https://cdn.shopify.com/s/files/1/0437/4410/0506/files/96381253093.pdf
    • https://cdn.shopify.com/s/files/1/0438/3031/3122/files/xovogexa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1283/9834/files/29505343036.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/31562659870.pdf
    • https://cdn.shopify.com/s/files/1/0438/6262/2358/files/67340497587.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/57673474481.pdf
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/dipole_antenna_theory.pdf
    • https://cdn.shopify.com/s/files/1/0434/0255/9655/files/65113166318.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3403/files/83567646477.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/zimixubugajanijesum.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_off0000636f.bin
aa9c654d0bce051a84e1784a0aa6a51f8545ad32256bdba5e3924d53f389bb72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 5168 bytes
font_01_sfnt_off000074e4.bin
9b558eb83b2a6bc9e53a8246aac99d45086c9df8d79943b1029ddadd33eaaf68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 10864 bytes

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