Malicious PDF — malware analysis report

Static analysis result for SHA-256 c455bc4a1b650756…

MALICIOUS

PDF

33.0 KB Created: 2020-08-28 01:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90e435ce800ff178cf568af33999dbe8 SHA-1: 128a030470f65cc8af5e6e9a7589f21549007b42 SHA-256: c455bc4a1b6507563271631f1c2d470e713ea7b4439367ea8a26b177a5ccfbb0
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate academic or popular content, but the primary link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL and references to sheet music, indicating a lure. The heuristic firings confirm the presence of a malicious redirector and a link farm, suggesting the PDF's purpose is to drive traffic to malicious sites.

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.me/pify?keyword=gladiator+theme+sheet+music+violin
    • http://files.coregenicconstruction.co.uk/uploads/1/3/2/6/132682892/limokivofegu.pdf
    • http://tejur.sghock.com/uploads/1/3/2/3/132302868/3436268.pdf
    • http://nozoxuja.fhacaurora.org/uploads/1/3/0/9/130969060/8531867.pdf
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/lehninger_principles_of_biochemistry_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/psn_error_ws_37397_9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/podufa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0631/files/brock_lesnar_workout.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/garoxafadebevevoxikuw.pdf
    • https://cdn.shopify.com/s/files/1/0439/0102/6459/files/68494998493.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.pdf
    • https://cdn.shopify.com/s/files/1/0464/6030/5560/files/offer_letter_acceptance_mail_format.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8694/files/35216100191.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/burned_karen_marie_moning.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/87244039664.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_off00004308.bin
e5bd20ff78ece1e947078efa1200af343b19602f45920db56b1166147ab5e1ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4308 5268 bytes
font_01_sfnt_off000054da.bin
aba383b8232c39d0611045c24934ebf719cdbb4efad24a35e7fefd6fcb6f84af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54DA 10012 bytes

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