Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d13fe8b07ca861…

MALICIOUS

PDF

39.7 KB Created: 2020-08-22 09:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f1b86726399c731e856eaea345857d8 SHA-1: 2a3a78a8af9900c0b440a9b2d359544118cb553d SHA-256: d8d13fe8b07ca8611b39bee78fc53d845206e7368052e3b929c895f7ae35abcb
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=online+form+for+passport+apply'. The document body also contains this URL, presented as a lure for a passport application form. Additionally, the file exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload or lead the user to a phishing site.

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=online+form+for+passport+apply
    • http://files.frauhoeckner.com/uploads/1/3/0/7/130775154/7555812.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/capral_extrusion_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/gisofogeraj.pdf
    • https://cdn.shopify.com/s/files/1/0436/7453/4041/files/41586148119.pdf
    • https://cdn.shopify.com/s/files/1/0436/9216/3227/files/63420199188.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/anari_full_movie_song.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/basic_computer_certificate_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/61364382085.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15843942414.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_off00005ee7.bin
8762f0814ddaac041e4cabef0d02ca83b434ce6148cd2fb7d0385d753bace17f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE7 5176 bytes
font_01_sfnt_off0000706c.bin
81c56bf071b1ff725cbd394704ec5590ba712974d53e804d8bdc1b0a40b86b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706C 9888 bytes

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