Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f124b4567f891cc…

MALICIOUS

PDF

40.1 KB Created: 2020-08-06 12:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9112b961398d77936d6cf8c007955737 SHA-1: ebec2da47fa63574be276fb174370b37a738a0f3 SHA-256: 2f124b4567f891cc34ffe47ea7cdf1ca97c1bd364e26d4ec8235a747c0c390af
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as educational material, but the primary link redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link https://ttraff.cc/pify?keyword=esl+reading+comprehension+pre+intermediate+pdf is part of a known malicious redirector chain. The document body is heavily obfuscated and contains what appears to be metadata from the wkhtmltopdf tool, suggesting it was generated programmatically to host these links.

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=esl+reading+comprehension+pre+intermediate+pdf
    • http://files.mmrcdsguerra.com/uploads/1/3/1/4/131410485/gibedozekadokifu.pdf
    • http://files.2ndchanceministrieschurch.org/uploads/1/3/1/3/131383380/831175.pdf
    • http://files.rabbitmountainlavender.com/uploads/1/3/0/7/130738625/futevukumuj_lulamatix_libujuferebetux.pdf
    • http://files.photographybypatti.com/uploads/1/3/0/7/130738748/685123.pdf
    • http://files.ardryfarms.com/uploads/1/3/0/8/130814535/269844.pdf
    • https://cdn.shopify.com/s/files/1/0431/7154/5237/files/78266641077.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38684703775.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3447/files/jawojeduvovudelu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/78128153518.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/trigeminal_neuralgia_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/58751783053.pdf
    • https://cdn.shopify.com/s/files/1/0432/7306/0520/files/karasedofuguso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibuzos.pdf
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/70532958301.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/49932311641.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/41132973537.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004828.bin
1e69e9ae67c0984f5bc001dabdb6883b8d150b2ac5207138fd8b48a97b584970
pdf-font-stream PDF embedded font (sfnt) at offset 0x4828 5524 bytes
font_01_sfnt_off00005acc.bin
55855022636410616bcc5fe7ce20da4ef99127847e5a3a916374cfa97baa6ebe
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACC 10196 bytes
font_02_sfnt_off00007ded.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DED 16092 bytes