Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9cae7c5a1c06a9c…

MALICIOUS

PDF

36.7 KB Created: 2020-08-06 16:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 562a08e4ff97cb0205a18afc4b2f7b8f SHA-1: b99e77a40653e83b7398cd63acf29bf873c2d44a SHA-256: d9cae7c5a1c06a9c329330173ec8d92cad41f4d14f0eecae0960607503c4b5bf
160 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One prominent link, 'https://ttraff.ru/pify?keyword=annales+brevet+2020+maths+nathan+corrig%25C3%25A9+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains keywords suggesting an advance-fee scam, such as lottery or prize language combined with draft/funds wording and courier delivery requirements. This indicates a likely attempt to lure the user into clicking the malicious link to initiate a fraudulent transaction.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=annales+brevet+2020+maths+nathan+corrig%25C3%25A9+pdf
    • http://files.letmebegreatchildrensyoga.com/uploads/1/3/1/3/131380295/luvipaxikudi.pdf
    • http://files.bathbombbootcamp.com/uploads/1/3/0/8/130874108/92c41ac.pdf
    • http://files.northeastsocietyforvascularnursing.com/uploads/1/3/1/3/131379183/femafadavifo.pdf
    • http://famiwidun.giaddiecreations.com/uploads/1/3/0/8/130813765/c1331.pdf
    • http://files.opalaneboutique.com/uploads/1/3/0/8/130815124/1113111.pdf
    • https://cdn.shopify.com/s/files/1/0438/3680/1181/files/mufumosodo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/41623334701.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/kukav.pdf
    • https://cdn.shopify.com/s/files/1/0434/9624/3364/files/zuvimoteririfavixulababuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/47973052694.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/93529211307.pdf
    • https://cdn.shopify.com/s/files/1/0428/9400/0295/files/wapokem.pdf
    • https://cdn.shopify.com/s/files/1/0437/1228/2789/files/jiwuboduki.pdf
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/mopamufakoni.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/tunefixilujoruvuzuvigixob.pdf
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/neumonia_adultos_2020.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_off00004b86.bin
49bff887d6d491ff6557d1c92780607830fd5459dfd98307c21a42bfaa7dfc1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B86 6176 bytes
font_01_sfnt_off00006020.bin
817bf9cfd23b8c90d34855113f440827f11ab0b8ac75418092ff5e05019fa4a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 10496 bytes