Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc49befc8e2c6412…

MALICIOUS

PDF

37.0 KB Created: 2020-08-16 22:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40521b2de58158b7845d00ea83c89513 SHA-1: c6a40ac8d49b17f3de951a36207144fd89945967 SHA-256: bc49befc8e2c6412f62420f96ea6397e17b4b7f97185c4ac228ad062069dd2ec
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to a malicious site. The presence of numerous PDF links indicates a link farm strategy, likely to improve search engine ranking for malicious content or to obscure the true destination.

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.com/pify?keyword=add+audio+to+video+apk
    • http://files.annflanneryyoga.com/uploads/1/3/1/6/131637313/90cd6e7.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/piwolijexuwamevokif.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/waxewimufimalo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/jexizumoxexutiminawofezi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8314/4093/files/8000247425.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40313354442.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0481/files/vunemolexagaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1043/2930/files/computer_certificate_sample.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/partnership_deed_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/yoga_poses_sequence.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/47644746978.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_off0000540e.bin
10a29824a796a7a44ffe5d6fdbf53f0c3706978183e2c2726ec96245c5bd0697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x540E 4760 bytes
font_01_sfnt_off0000645b.bin
8a13733dd29d5ade6335a6b607eb9ba765ccdc2f17a3dfeb9613f041b81f1d97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645B 10408 bytes

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