Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7f8500e48e38fe…

MALICIOUS

PDF

35.2 KB Created: 2020-08-08 00:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d57dd9d44dce12d2897c758bd930c65 SHA-1: c8c2135680d83c04b14cbcc536f35ddba58744e2 SHA-256: 9f7f8500e48e38fe1decc94232e765db465cc4e0bfebcea006b9e303e97a91c3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The document body, though partially corrupted, contains the same mathematics-related title as the malicious URL, reinforcing the lure. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.ru/wb?keyword=maswali%20ya%20hisabati%20darasa%20la%20nne%20pdf
    • http://files.virginiabaptistscommitted.org/uploads/1/3/1/4/131453124/zimefuxabusonikuka.pdf
    • http://files.frankicolett.com/uploads/1/3/1/6/131636941/3872298.pdf
    • http://files.myschievia-ntxb.com/uploads/1/3/1/8/131872137/2772053.pdf
    • https://cdn.shopify.com/s/files/1/0436/2335/0434/files/2127724689.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/58433793694.pdf
    • https://cdn.shopify.com/s/files/1/0454/3682/9854/files/battery_capacity_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/sowiximifubezogebidefob.pdf
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/accounting_term.pdf
    • https://cdn.shopify.com/s/files/1/0437/7506/6273/files/bodud.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/wijifi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/36614434403.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/les_liants_et_les_adjuvants.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/munaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/nuxunudopobekofubekodag.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_off00004adc.bin
bc35f2c9b16ae0e7519687a7fb7d20edf08f7c6cb771ac23e93750d0763d63ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ADC 5468 bytes
font_01_sfnt_off00005d87.bin
bf56b46c06b5934085ffd7e2c8fe3d79f906bf5ec556fc88cfbaf6e816d86306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D87 10100 bytes

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