Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8227bfb1b663fcf…

MALICIOUS

PDF

43.9 KB Created: 2020-08-21 11:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b23d9b71fb84842eafeb12a42af239c8 SHA-1: d613f01fac885681a367320a2424055c4d997b47 SHA-256: a8227bfb1b663fcfb4597fef16b8fc04ca8c156037937ee183f153e1ae858b9a
140 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.cc' is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'cosmetology test study guide' and the malicious URL, suggesting a lure for a phishing or scam campaign. The presence of numerous external PDF links also indicates a potential SEO poisoning or link farm tactic.

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=illinois+cosmetology+test+study+guide
    • http://files.shortgoclothing.com/uploads/1/3/1/4/131407901/getovux.pdf
    • http://files.eileenchai.studio/uploads/1/3/1/3/131380771/290363.pdf
    • http://kixap.lunalili.com/uploads/1/3/1/3/131398125/guxupuvomoliw.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/65220526564.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/patekit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/7280302470.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/12181367079.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/arteritis_de_la_temporal_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/43742445894.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/tilat.pdf
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/64832627776.pdf
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/74399432459.pdf
    • https://cdn.shopify.com/s/files/1/0448/4271/3249/files/nursing_interview_questions_answers_and_tips.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/43794473818.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_off00006d0b.bin
1e05b00b8b0ec4cb393799bbff104fa26f7ff7abf9144f98926b49161ef115ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0B 4992 bytes
font_01_sfnt_off00007df4.bin
0de19cd3ca30633e20ad0374fc6da833f3ce68c0c0ad0f6f66e7a58e1031b435
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF4 10704 bytes