Malicious PDF — malware analysis report

Static analysis result for SHA-256 9158cae180d6713e…

MALICIOUS

PDF

44.2 KB Created: 2020-08-11 07:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d30f86edf67c2371f76953b81182420f SHA-1: e8a86b3390798ffeb1c01b195a0432a6c37e3404 SHA-256: 9158cae180d6713e2dbbb5bf2a307bb636ea09027c5d93157068b341ea6426f7
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the same malicious URL. The presence of a 'download button' heuristic further supports the lure of clicking a link. The file's purpose is to redirect the user to malicious infrastructure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=requirement+elicitation+and+analysis+in+software+engineering+pdf
    • http://files.unitedpublishersofarmidale.net/uploads/1/3/1/3/131379719/ae056e3b.pdf
    • http://files.nourishingacres.com/uploads/1/3/1/4/131453215/zefadodukenoju.pdf
    • http://files.ibisregalia77.com/uploads/1/3/0/8/130815026/wijimomabem_zumenisev.pdf
    • http://files.mtunionchurch.org/uploads/1/3/0/7/130739826/3541063.pdf
    • http://files.ryanshowland.com/uploads/1/3/2/7/132740978/7f7245a6b279f9a.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1959/files/9209324383.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/49803074334.pdf
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/45816468451.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/35904848542.pdf
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/syntax_score.pdf
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/tifegireponebikibanovejop.pdf
    • https://cdn.shopify.com/s/files/1/0431/2609/6036/files/susipenofad.pdf
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/xumuwuwerani.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/77580752166.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70998441087.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/ramitulawopuwop.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_off00006d71.bin
3f23cdabcd867b4dfbe7bdbdd76d1d8ca2eca545bc079160fffbcfaa5d6e243a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D71 5800 bytes
font_01_sfnt_off00008136.bin
f7d0ec5fdcc6612b3cbcc9ede1e4e71cd401a8ac7b66cc72d438768d7f091671
pdf-font-stream PDF embedded font (sfnt) at offset 0x8136 10156 bytes