Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a372681f1b0a58…

MALICIOUS

PDF

45.4 KB Created: 2020-08-23 16:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3e122a109cfbb6680e511c6665ec433 SHA-1: 2fc6c44f77a9f535e803069420b9dcfc0afa55b2 SHA-256: 24a372681f1b0a587e9122134ce2bf57c3a34e3851f2c6879cd77c21dda94d85
140 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that appears to be part of a link farm, aiming to increase visibility. Another heuristic indicates a callback phishing lure, suggesting the document may prompt the user to call a number. The presence of numerous embedded links, many pointing to Shopify, further supports the link farm hypothesis.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=citroen+c5+aircross+130+flair+5dr+manual
    • http://nadolijo.digistitchcustomapparel.net/uploads/1/3/1/3/131379290/8424891.pdf
    • https://cdn.shopify.com/s/files/1/0464/7914/7176/files/3404977113.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/30164555775.pdf
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/dragonskin_map_locations.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9269/files/capacitor_colour_codes.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/nododanabonumowujigono.pdf
    • https://cdn.shopify.com/s/files/1/0432/4448/6811/files/20615474225.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8927/files/mebedabuvogatefefizon.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/sulazerogazajola.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5157/files/3d_reader_ios.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22537170944.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0435/8602/7677/files/kobemajoresebasijajipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5479/files/nonituvubagoror.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_off00006b8d.bin
88547b65ac5e503111053c55dc918e6eb0bedaf53d93a940f8cfe4f3462fc229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8D 5552 bytes
font_01_sfnt_off00007e56.bin
e34f881a68923f567e39272608a75883570212b0e07090478598080274fda225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E56 13224 bytes

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