Malicious PDF — malware analysis report

Static analysis result for SHA-256 945930a9d866f62f…

MALICIOUS

PDF

51.0 KB Created: 2020-08-08 06:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89319e92d646ca2c7a78fff9c4353233 SHA-1: e3a293e07393cf6258e16670c0877a6da2dd58cb SHA-256: 945930a9d866f62f69c5d5fa05381840b4b899442296ba911bf65bd5b38bd136
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=amino%25C3%25A1cidos+essenciais+e+suas+fun%25C3%25A7%25C3%25B5es+pdf'. The document body, though partially garbled, suggests a lure related to 'essential amino acids', likely to mask the malicious intent. The presence of multiple Shopify-hosted PDF links further indicates a link farm strategy.

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=amino%25C3%25A1cidos+essenciais+e+suas+fun%25C3%25A7%25C3%25B5es+pdf
    • http://files.alabamamobilehomebrokers.com/uploads/1/3/1/6/131636719/07f3d009838.pdf
    • http://pelogeg.craftopoliscraftclub.com/uploads/1/3/0/7/130776760/jolipe.pdf
    • http://files.sasklilysociety.org/uploads/1/3/1/1/131164159/4214593.pdf
    • http://files.abundantgracesparta.org/uploads/1/3/0/7/130739742/purer.pdf
    • https://cdn.shopify.com/s/files/1/0435/2439/1067/files/37194524715.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/waneberonimisatatika.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30552771564.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/88131128974.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/zupexotavidowudasanu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5638/1597/files/79305498647.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/delete_changes_git.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/96946204380.pdf
    • https://cdn.shopify.com/s/files/1/0439/0453/2648/files/vowozetagirotug.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/14879198722.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_off0000863d.bin
3cf958ac8e6bff6457952aff1d29e238b13b2ad0f129a696d8462a22d692c136		 pdf-font-stream PDF embedded font (sfnt) at offset 0x863D 5796 bytes
font_01_sfnt_off000098d2.bin
f82ee490ac079115c154be90a93f42b7edb67620a5f4f8d6d494dfd1f7c6ed62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D2 11972 bytes

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