Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec57c3bbd985da9…

MALICIOUS

PDF

62.1 KB Created: 2020-08-08 01:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86a0db66f2cd39e489422092f7fa4732 SHA-1: 712ac094c0b324d3a374c76630d0db3e9feef08a SHA-256: aec57c3bbd985da99eafb4f257babb76b0a2f660ca1e5d9d0ac311e4971c9d0f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=ctet+eligibility+2020+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, further supporting the redirection attack pattern.

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/pify?keyword=ctet+eligibility+2020+pdf
    • http://files.herbesque.com/uploads/1/3/1/6/131637037/fuxarazab_negoxe.pdf
    • http://daduruxe.darkandfevereddreams.com/uploads/1/3/1/0/131070722/2583301.pdf
    • http://files.mypcda.org/uploads/1/3/1/4/131438056/jikegojat.pdf
    • http://files.sunderlandpottery.com/uploads/1/3/0/9/130969402/pafokazok-suxixutifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/life_cycle_of_ascomycetes.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/texojesowora.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4108/6888/files/10465647238.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/31318784626.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/27267512578.pdf
    • https://cdn.shopify.com/s/files/1/0436/3111/6448/files/8594308491.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4812/files/asp._net_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0430/7589/5450/files/nekifuwevekewodoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/51326410403.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1292/files/28063914969.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/9403756790.pdf
    • https://cdn.shopify.com/s/files/1/0452/1459/7271/files/kitab_agama_islam.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a610.bin
fcc15d15b6144df6196a7b3e5a4790a6146a89b3c087cea9b18ad9b4a3993e95
pdf-font-stream PDF embedded font (sfnt) at offset 0xA610 5148 bytes
font_01_sfnt_off0000b7b5.bin
ce262d0b12101ec361e29acc53af8ac954a4be4d9b583623cd03f2f11bd1263c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B5 10768 bytes
font_02_sfnt_off0000dc89.bin
82a06516b57c37d8ea1e0edc7cbca19f06b8700a5a7c210bdbea2874117abd83
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC89 3776 bytes