Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13db9cbcc8dfb33…

MALICIOUS

PDF

33.3 KB Created: 2020-08-08 01:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ccd583673034eaa687ac5d0d8558e21 SHA-1: 69c5e7096af4abc1c8f5a932d138cbd20b7a2c26 SHA-256: a13db9cbcc8dfb3376bc16ce717d74ef965066642520d9a60464b8fb63702408
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=aptitude+test+book+pdf+ethiopia'. This URL is embedded within the document body, disguised as a link to an aptitude test book PDF. The presence of a link farm heuristic further suggests an attempt to distribute malicious content. The document body itself contains obfuscated text and the target URL, reinforcing the lure.

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=aptitude+test+book+pdf+ethiopia
    • http://files.julianrichings.net/uploads/1/3/1/3/131398099/3473106.pdf
    • http://files.artsimaginarium.com/uploads/1/3/1/4/131406717/nozuziwel_wizit.pdf
    • http://files.neuralmechanisms.org/uploads/1/3/1/4/131437822/7309885.pdf
    • http://files.morpheusandiris.com/uploads/1/3/0/7/130738569/76a393.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1407/files/40210893871.pdf
    • https://cdn.shopify.com/s/files/1/0435/8828/8670/files/pupezozaraxila.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/46907900995.pdf
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/wimiramukulafax.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/19767585156.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/29242940829.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/71848196548.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/98335586934.pdf
    • https://cdn.shopify.com/s/files/1/0435/2504/6431/files/gta_vice_city_all_cheat_codes_free_download.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_off00004488.bin
7d20d6c22671299b32adda2dbc99fbf64a80cfb956044fef13efd19637e54efb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4488 5196 bytes
font_01_sfnt_off00005634.bin
1528825d84e486a2d0c95e29e2b720dde7123e12fea6e252eaec233a34c2fad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5634 10212 bytes

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