Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf236da5233cec5…

MALICIOUS

PDF

46.0 KB Created: 2020-07-28 11:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc19243e6921933eb1024acbdf0bb818 SHA-1: 61d9e5cf3cd2385c8ac70fb09a4ff9836d11dc82 SHA-256: bcf236da5233cec563f0d1e2e2064ce5274e50bce85b9c96e00eabc69b8aa6fe
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common tactic for SEO poisoning or directing users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=world+of+warcraft+vanilla+herbalism+guide', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or heavily obfuscated, preventing a deeper analysis of its specific content beyond the presence of links.

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.ru/pify?keyword=world+of+warcraft+vanilla+herbalism+guide
    • http://files.lightenlifewellness.com/uploads/1/3/2/6/132683088/lanenisonufogelu.pdf
    • http://files.judydeal.com/uploads/1/3/1/1/131164424/tibufe.pdf
    • http://files.wyattclark.net/uploads/1/3/1/4/131453068/xogadiwagefeji_gatojif_lejoviximitak.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1658/files/65582998419.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/78004332874.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/dorilufukejaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/vozokinejamuvolamituw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/68862793635.pdf
    • https://cdn.shopify.com/s/files/1/0433/3889/1419/files/9210328873.pdf
    • https://cdn.shopify.com/s/files/1/0431/1678/9927/files/tesikuxogojukageb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/dupikokenuxipotupopap.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/lewoderilaponef.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/28953537385.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/pabunekevav.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/files/1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075b7.bin
3ed34f489daa88404bb66bf932ecbd7054b2c40959e921d645e97e863c97019c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B7 5624 bytes
font_01_sfnt_off000088c2.bin
83ee76898292f3f92f89477526985ab12df6faeadc6f3b35429a81128e9412a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C2 9872 bytes

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