Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ff75773c32aa4a…

MALICIOUS

PDF

53.3 KB Created: 2020-09-04 21:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 645d7af1c5352558b28e897acc43e3fd SHA-1: 6cd10b6b32ec0b4d9eacc56ebefa3ce33d690490 SHA-256: c2ff75773c32aa4ace89b094605c6c11624da50a103fa3cf29f210b2b9a40191
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Pearson math book algebra 1 answers', suggesting a lure. The presence of multiple external PDF links, many hosted on Shopify, further supports the SEO link farm tactic. The primary malicious URL identified is https://ttraff.me/wix?keyword=pearson+math+book+algebra+1+answers.

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.me/wix?keyword=pearson+math+book+algebra+1+answers
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/rimupon.pdf
    • https://cdn.shopify.com/s/files/1/0463/0370/7296/files/free_0098_farsi1_serial.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/hermes_scarf_tying_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/dofopababonelad.pdf
    • https://static.usrfiles.com/ugd/b13fd1_8e2b905c483f46279adf03a2e64fbfc9.pdf
    • https://static.usrfiles.com/ugd/d162e3_71bf9f6d9d4f4855b3afaad3b03bb392.pdf
    • https://cdn.shopify.com/s/files/1/0432/0146/2436/files/wujufob.pdf
    • https://cdn.shopify.com/s/files/1/0429/5242/5631/files/cincia_engenharia_de_materiais_-_uma_introduo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/68492375523.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/k_g_f_ringtone_tamil.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_off000091cb.bin
b3f4a9dcf0122ab1ccb720b72c4540a4f3101d51a854c5f51d6a8640916f9090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91CB 5448 bytes
font_01_sfnt_off0000a440.bin
32eefe0b22136d600a2a7403193786a4082e9bb8e95a494487534f6f8602fc28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA440 10480 bytes

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