Malicious PDF — malware analysis report

Static analysis result for SHA-256 f536445ba72aaed1…

MALICIOUS

PDF

54.1 KB Created: 2020-07-31 14:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: affc419fba6a62347c7157343ed9c64d SHA-1: 49525520494b3eac6b20f833185bc5a35b3ccf70 SHA-256: f536445ba72aaed1a340dc652770b2d73bf17bdba79cd08701b9766b27aae11a
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous links hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Adobe pdf converter software', suggesting a lure to trick users into clicking the malicious link. The presence of a 'download button' heuristic further supports this phishing-like lure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adobe+pdf+converter+software
    • http://files.mndeathcollaborative.com/uploads/1/3/1/4/131438839/c03b91448.pdf
    • http://files.shaqisoutthere.org/uploads/1/3/2/6/132681992/eadd9bcb8be7cb.pdf
    • http://files.redriverretentionauthority.net/uploads/1/3/0/7/130776712/xukulimoguxal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/lemudovap.pdf
    • https://cdn.shopify.com/s/files/1/0431/1272/6677/files/bomuzorixapaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/44911689814.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/galuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/kojivojebuvodubakogadupe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/44962643565.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/kowadoremaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizuvesadumewagetikuxumut.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2102/files/xabizataze.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/54601751770.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/vegukekiposapuvofir.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_off00009650.bin
31a685a4609d0b15ab6fcdf885d37c0f8cc1a2ce148413234cacde0d63e62c22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9650 5136 bytes
font_01_sfnt_off0000a7d4.bin
4ef31280a0f01ae2d21ebe2ccb20ced51d807942b8038c0017cb6bbbab1b5d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D4 10344 bytes

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