Malicious PDF — malware analysis report

Static analysis result for SHA-256 585755dd217c4e89…

MALICIOUS

PDF

68.9 KB Created: 2020-08-06 02:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 071479879278622f6f9822e997a084a7 SHA-1: f439242fb8f9e629c36a620c7d4abf32523b2677 SHA-256: 585755dd217c4e8996f1071e8ad0ce1c8d8c775690d2b086774fa634bd80c950
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.cc/pify?keyword=aviation+francaise+magazine+pdf'. Another critical heuristic identified a PDF link farm, with 'https://cdn.shopify.com/s/files/1/0434/7019/2805/files/votatu.pdf' being the first listed. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains references to 'aviation francaise magazine pdf' and the wkhtmltopdf tool, suggesting a lure to disguise malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=aviation+francaise+magazine+pdf
    • http://files.gozamurai.com/uploads/1/3/1/8/131860060/9c8ebd73cec.pdf
    • http://files.wfbistro.com/uploads/1/3/0/7/130776795/3334411.pdf
    • http://files.musemodelsdarwin.com/uploads/1/3/2/6/132696351/7980892.pdf
    • http://files.ryegentrytrucking.com/uploads/1/3/1/4/131411199/varefozukak-fekolixujazizov.pdf
    • http://files.denvermindbodyessence.com/uploads/1/3/0/7/130740502/tixudumatevefutek.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/votatu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/zetanufusimugufixowima.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/list_of_adjectives_to_describe_food.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/67745281824.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/sofifarusoxulinulik.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1974/files/wotet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/bulk_delete_twitter_likes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/divorce_application_form_qld.pdf
    • https://cdn.shopify.com/s/files/1/0435/5748/6753/files/medical_assistant_cover_letter.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/78907737322.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_off0000c1df.bin
35e1c154c21d8f14debe2c920502d22bc217555935ca760a78855538330b9826
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DF 5540 bytes
font_01_sfnt_off0000d4b9.bin
267f8773e120741a1b7c0a1f2557b79997caec35103b0ac3aa57ff8e8d5fb596
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B9 16684 bytes