Malicious PDF — malware analysis report

Static analysis result for SHA-256 372f41d3e53eb89c…

MALICIOUS

PDF

37.4 KB Created: 2020-08-22 14:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d9eb8d8e0b8225054ff0567b03ceb78 SHA-1: 6b6d4c901d74b8d7d1c7ab28ffcd4cd0ac1599a1 SHA-256: 372f41d3e53eb89c0652f17cea39f81cb6e132f8f16a0af3402f51e61877e0d2
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is disguised as a piano sheet music download. This redirector likely leads to a malicious payload. The document body, though heavily corrupted, contains fragments of the malicious URL and benign-looking text, reinforcing the lure. No scripts were extracted from this sample.

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.ru/pify?keyword=happiness+loves+company+piano+sheet+music
    • http://files.deepdrillinginsights.com/uploads/1/3/2/7/132710632/gewumejamoxados_rinolifu.pdf
    • http://files.mrschassardsbiology.com/uploads/1/3/2/3/132302940/tonizuninufis_xafogumipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8362/files/free_birthday_gift_voucher_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2478/5319/files/developing_skills_for_the_toefl_ibt_intermediate_reading.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/52778486803.pdf
    • https://cdn.shopify.com/s/files/1/0433/8755/1893/files/paborudesepejupivibaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/6160317211.pdf
    • https://cdn.shopify.com/s/files/1/0444/4468/0359/files/givururas.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/dipupajitolodazu.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/5716339699.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/kutubitixuwutivejeziw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/carrier_infinity_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/robert_heinlein_all_you_zombies.pdf
    • https://cdn.shopify.com/s/files/1/0433/5842/1142/files/l_amore_ai_tempi_del_colera_libro.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/zowavezakijuwunapozo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/mumerosu.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_off000052f0.bin
c86e5eb3254ce3042643a14de1b03eeea94cf3390aebcf110fd7a94c0acca87f
pdf-font-stream PDF embedded font (sfnt) at offset 0x52F0 5200 bytes
font_01_sfnt_off0000647e.bin
09fd0dad7660d33b25341dc4e6c9040399a8a51a806cfe9d445778b1a077aa63
pdf-font-stream PDF embedded font (sfnt) at offset 0x647E 10540 bytes