Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1434be327af444…

MALICIOUS

PDF

50.3 KB Created: 2020-07-31 02:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f89f89fd0bfaa75a3251a532c55b2fe SHA-1: b295b6d72e78aa3962b2c189b6033ebaf5bfae83 SHA-256: bc1434be327af444eb8affb6df05e7ed79d57905f08b8f2d53959d25334e8f11
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. Another heuristic indicates a mass external PDF link farm, suggesting a SEO poisoning or link farm tactic. The document body, though heavily obfuscated, contains text related to 'Aicpa ethics exam pdf', likely a lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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.com/pify?keyword=aicpa+ethics+exam+pdf
    • http://files.heritageschoolofdiscovery.com/uploads/1/3/0/7/130775145/9742970.pdf
    • http://files.abcdts.store/uploads/1/3/2/6/132681878/84c5aa99f.pdf
    • http://files.keribaskin.com/uploads/1/3/1/4/131454355/3071001.pdf
    • http://files.ashleyparsonsyoga.com/uploads/1/3/2/7/132740415/newixebomufobezofawe.pdf
    • http://files.nikkileahdesigns.com/uploads/1/3/1/6/131606231/juwidu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/728313151.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/54450167490.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/tiwibewapizut.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/fosesatonetokevob.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/rezunuf.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/kumaliwonigofasig.pdf
    • https://cdn.shopify.com/s/files/1/0429/2100/1119/files/nojed.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/sirifinurigokin.pdf
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/menit.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/61410823458.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/soxafil.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087db.bin
37eb49c245a8b7e6e6d76dddd822e9be985c23666ab98256ccce457ba2901f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87DB 4896 bytes
font_01_sfnt_off00009889.bin
600e4dda4f4ac9f8c62d13b5d3882fba343b3c9835e7ec88a9a6ab37fa3b095a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9889 10516 bytes

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