Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ba6fbcf4f7a518…

MALICIOUS

PDF

34.6 KB Created: 2020-08-18 21:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91fcfe6a5889917e4168b50bfeddfa3a SHA-1: 4fd9db455b8de9cf9babec99d348dbac9b49d4e4 SHA-256: 92ba6fbcf4f7a5180e8c745364f5ed07df056230b00fa1b9454d506725f52b32
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for an 'annual report'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=evalueserve+annual+report
    • http://files.birchsage.com/uploads/1/3/1/8/131858661/vawimes.pdf
    • http://xigeju.theholycatholicchurch.com/uploads/1/3/1/4/131438282/bufiwikopamib_vazexegu_lajuvotem_wolibon.pdf
    • http://razuxuman.alrightdiving.com/uploads/1/3/1/4/131453033/1441848.pdf
    • http://files.baljagat.org/uploads/1/3/0/8/130814466/9931923.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/mowutagujedebuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/agriculture_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0452/0571/7141/files/15050734811.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/xaxevejusegifetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2882/3719/files/rudexorojotuweli.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4339/files/71245042519.pdf
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/42030152848.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6250/files/vezirukanokixabibol.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_off00004a73.bin
6e46d1564749c8481c83ff53bb74c2f9dcc189787b12315b9f67b1acac013190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A73 4832 bytes
font_01_sfnt_off00005af0.bin
78a8f5034e247537444259f1000cc1f52bf7a2f6b78f516f4fd69aa057c6cf8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF0 10228 bytes

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