Malicious PDF — malware analysis report

Static analysis result for SHA-256 424fcf334f9f7954…

MALICIOUS

PDF

53.8 KB Created: 2020-08-07 13:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 517fc1fbc4c72d8836caf94229df79ce SHA-1: be06ed8dbc5e1bfcea893dd716a73402161bf132 SHA-256: 424fcf334f9f79543f52246f7eb9a9e9b06cf78ae0ca397ecebdf72e583fbf02
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at `ttraff.ru`. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious content. No scripts were extracted from this sample.

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=analytical+chemistry+gary+d+christian+pdf
    • http://files.peterdeshane.net/uploads/1/3/1/4/131438228/4238033.pdf
    • http://dedutuxux.wesleyofyakima.org/uploads/1/3/0/7/130740069/watonawe.pdf
    • http://files.redseaem.com/uploads/1/3/1/6/131636916/9135664.pdf
    • http://fomefobo.buttermilkbrook.com/uploads/1/3/1/3/131398140/2948007.pdf
    • http://files.tear-a-page.com/uploads/1/3/0/7/130738714/simeminom_rujozugexezaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2009/8472/files/11281905155.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.pdf
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/dofonesetin.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/susipabejurujubus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/kedigivelorawifotu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4168/files/netaji_open_university_assignment_cover_page.pdf
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/ragafunulifikuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/6549/2127/files/46911753364.pdf
    • https://cdn.shopify.com/s/files/1/0437/9456/3229/files/stepper_motor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4474/1015/files/photoshop_cs3_torrentino.pdf
    • https://cdn.shopify.com/s/files/1/0431/4172/6370/files/vapuzuzovivapefajulurit.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_off0000877f.bin
878ac0b891414b7054640b1fd5a296fccc3c20c7e4f32eca8459bfabb223593b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x877F 5660 bytes
font_01_sfnt_off00009aa8.bin
97330e73e2ac06b96bd773ff7686645720bba8e65d95e42240ce16c0f8248532		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA8 15148 bytes

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