Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9eb3c279b636cb7…

MALICIOUS

PDF

43.0 KB Created: 2020-09-01 19:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cc22e5a3abbfc5c3b6be910b2a4185b SHA-1: 8c6f97a26f33d76b3e9dec68820f4b3ccd21ee62 SHA-256: b9eb3c279b636cb70edc76bac6cd437f056a3ec95c011c03903f354745738cad
140 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, 'https://ttraff.cc/wix?keyword=equifax+contact+information+united+states', which is flagged as malicious. The document body, though heavily obfuscated, contains references to Equifax and appears to be a lure for a callback phishing or tech-support scam. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used to improve search engine ranking for malicious content.

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/wix?keyword=equifax+contact+information+united+states
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/97453487727.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/bone_formation_growth_and_remodeling_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/xupetavufatira.pdf
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/files/surat_ar_rahman_latin_dan_terjemahan.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/26396706688.pdf
    • https://static.usrfiles.com/ugd/5ed537_c4fa503ae1dc49d1a5f1c66e2bfd1468.pdf
    • https://static.usrfiles.com/ugd/6d59ab_06d449f4e03243479c875308935985d0.pdf
    • https://static.usrfiles.com/ugd/02beb7_e0c4f6c282f7499db618ebee7ed1b0b1.pdf
    • https://static.usrfiles.com/ugd/225520_0041115b7fbf4aac81773a74a185ff3d.pdf
    • https://static.usrfiles.com/ugd/1d64af_244619bdce56400c91b2547d14908d99.pdf
    • https://cdn.shopify.com/s/files/1/0440/5762/4726/files/gst_annual_return_form_excel_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/ohio_commercial_drivers_license_manual.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/
    • https://cdn.shopify.com/s/files/1/0440/5762/4726/files/gst_annual_

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b19.bin
6d434c1189a3c64806702d9cf8e945ac548251690f14660e1abfc7b323a00c9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B19 5168 bytes
font_01_sfnt_off00006c8f.bin
529fee367e49a54d0b30125d20443bfd9fbdb3f67293c7f707dad35274a22b6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8F 10604 bytes
font_02_sfnt_off000090cd.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x90CD 4324 bytes