Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b501fc2b830ea7…

MALICIOUS

PDF

43.8 KB Created: 2020-08-01 17:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d73f51e160bf9f7b75dc48b65d3487f SHA-1: d66994a3dce3fcd5fcc63a50e3bb06fc3693636f SHA-256: 91b501fc2b830ea77a9e8c872100d67c8bf97dbeb64ed44f2f23ee1c86d87ec0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a direct link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL that likely serves as the lure. This suggests the document is designed to redirect users 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.ru/pify?keyword=tbc+leatherworking+guide
    • http://files.900beacon.com/uploads/1/3/0/7/130776682/gevoge.pdf
    • http://files.nfmarespect.com/uploads/1/3/0/8/130873983/ronagopemopomi_karalomesojo_mupaguderep_nemukotibopike.pdf
    • http://files.bowerslab.org/uploads/1/3/1/6/131606111/wodigelezudavojuge.pdf
    • http://files.coaster-notes.com/uploads/1/3/1/1/131164452/pexirigurufoxa_samanavogovote_ramamimugafod.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/969573846.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/3542571544.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/kofefimimafetukipoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5520/8858/files/54793976404.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/sivabawokabakaloxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/kifuni.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/79932252208.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/junurejifababebaronu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/wimaxukipulimivuvubami.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/64026767948.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_off00006e5d.bin
be76a858e41c73788a0377313ab21eed68fc375cc28c41ebd18de53b81895e4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5D 5268 bytes
font_01_sfnt_off00008052.bin
a0d85009b65e2c81e714238f726244d7e033813a1943e5f27a3fab3b580ebfed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8052 10028 bytes

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