Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c49a74772c8c658…

MALICIOUS

PDF

42.9 KB Created: 2020-08-06 13:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac54ebe0a762704ce7ccb2c3d176c302 SHA-1: f6878c74a159b0c066583d4838701138af8f30ab SHA-256: 2c49a74772c8c658e9f3c30f0cd35193266bcdc3ba202867d06d3a16a1fd99c5
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=anti+anxiety+drugs+list+pdf', suggesting a lure to disguise malicious redirection. The ML classifier also strongly indicated maliciousness.

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=anti+anxiety+drugs+list+pdf
    • http://files.friendsofmarplestation.co.uk/uploads/1/3/1/4/131453247/davifuvowuzuva-nidemezalon.pdf
    • http://files.iwanderwhy.net/uploads/1/3/1/3/131381414/buzet-kutize.pdf
    • http://files.cutiedokicakes.com/uploads/1/3/0/7/130740429/0859afe8b452c.pdf
    • http://jekol.corletochemistry.com/uploads/1/3/1/4/131452977/a1864744.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/vocabulary_list_for_bank_po_exam.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/wizuvune.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/dovakiwaxelo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/66497919101.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/62099846240.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/letubefamexijijodipewute.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/ffxiv_how_to_install_act.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/effortless_mastery_kenny_werner.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/moduxabowoza.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/git_rename_tag.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_off00006b90.bin
ca3f7aba46bb022696091a8831c4eb7f72e1c358ae3aa79229b2557cbde29da6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B90 5368 bytes
font_01_sfnt_off00007dee.bin
a9714aecc786d9479477a8a67905965141e4bfeda27ed67dd55a81b64053aa75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEE 9728 bytes

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