Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09640b98d83f92b…

MALICIOUS

PDF

37.9 KB Created: 2020-08-29 12:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90c45260a9318d6548d2c2475e317e59 SHA-1: a6a9cd065f6f0ad4435a0680bd3c7175552ba1a9 SHA-256: a09640b98d83f92b7aa2552a921058b8ab1b2c467ee2c705f02af7f7df9c9d3e
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a link farm containing numerous external links. One of these links, 'https://ttraff.com/wix?keyword=piropo+will+kill+you+recopilacion+de', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The file's purpose appears to be redirecting users to malicious sites, potentially for phishing or malware delivery.

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/wix?keyword=piropo+will+kill+you+recopilacion+de
    • https://static.usrfiles.com/ugd/b8c837_4044c70bd1634e7f91176e2bca3425b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bcc5f2c98884778aaea515996663cd5.pdf
    • https://static.usrfiles.com/ugd/e3ff21_d55a5feb40204b18ad495b2cb7fcc8e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_eeeec7059f2c46c69f5ad0e5a6696a2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_40a2cbe2afd748799e551873f3087246.pdf
    • https://static.usrfiles.com/ugd/b8c837_d87cadde1a834953bef59706939dbe68.pdf
    • https://static.usrfiles.com/ugd/b8c837_20229b7b7e3744d6b901b8582be45f72.pdf
    • https://static.usrfiles.com/ugd/b8c837_99954bb74cb147488e9f8f03f8aefa03.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/91516183026.pdf
    • https://cdn.shopify.com/s/files/1/0428/6837/5719/files/45078825029.pdf
    • https://cdn.shopify.com/s/files/1/0444/6827/3319/files/64835596912.pdf
    • https://cdn.shopify.com/s/files/1/0459/6318/2247/files/fofupo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8449/7575/files/kamisama_kiss_vol_1.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_off000055e1.bin
35f195a6e32f03690be9d449c21ee1ed4ac6259914751ce3525ffc03d4828021		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55E1 5148 bytes
font_01_sfnt_off00006783.bin
f0579590f94b2829859d6d4c5016efb1ca6d83f4d02addc00ec6ab1f62dba623		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6783 10652 bytes

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