Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc0cf9e34f1ce49…

MALICIOUS

PDF

40.2 KB Created: 2020-08-29 21:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5a7e9e816d7cd43e78f6ca5c2cdcb1a SHA-1: bf4338f09bd61a8f11b01cb52cf63a958770c3fc SHA-256: 8cc0cf9e34f1ce495c758a8aa6e392225b7fe51c1c02b36c613c5f6ebe6d3fb2
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=dugun+dernek+film+indir'. The document body, though heavily obfuscated, appears to contain text related to film downloads, suggesting a lure. The presence of numerous embedded links, many pointing to static user file repositories, further supports the idea of a link farm designed to obscure the malicious redirector. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=dugun+dernek+film+indir
    • https://static.usrfiles.com/ugd/efb3f0_1b1f9b2a15824c98a0913739c0c6708d.pdf
    • https://static.usrfiles.com/ugd/63d3ad_dab461317f3945c6b54991c554a1ea43.pdf
    • https://static.usrfiles.com/ugd/a4d998_65b215e183df427492d2910552f3254c.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb41f20180e6413098396a9da2b9956c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b002cd73ffa41b9817fcd4d62e84f6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c159f4d8ca4240e18999fa4ac7f3c1ad.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/sonolipuburu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/sobazonumafarewaxagul.pdf
    • https://cdn.shopify.com/s/files/1/0462/3767/9776/files/is_456_amendment_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/kapobawedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7405/2503/files/gotivofuvadededolopet.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/2124611482.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.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_off00005d67.bin
b63bb913e18769f88168d5c53708956e5bb9ef9ff7033c02d92ad6033e6070eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D67 4900 bytes
font_01_sfnt_off00006e03.bin
07f3a31b90a5db37d932f84f5bd4c888fffc52a1752a0a72f793a35e017b4982		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E03 12384 bytes

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