Malicious PDF — malware analysis report

Static analysis result for SHA-256 236579a749480cec…

MALICIOUS

PDF

45.2 KB Created: 2020-08-22 14:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75a9d6c1ef8e52a939b676f9bf14633d SHA-1: b85e9fa9dbe9cb9e771c32e88c8e2889bb7821c2 SHA-256: 236579a749480cecf705f52c3259898eccf4170ce9094b8369056d09fdb2eccf
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to a 'Fjallraven uk size guide'. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted from this sample.

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=fjallraven+uk+size+guide
    • http://zixapo.industryumc.org/uploads/1/3/1/4/131454207/5709541.pdf
    • http://files.musicianpierre.us/uploads/1/3/0/7/130775084/1037371.pdf
    • http://xegokike.kyokanconnect.com/uploads/1/3/1/4/131438539/gudufe-xojali-rufuxogunaz-juvuvuwewipi.pdf
    • http://files.randirouge.com/uploads/1/3/1/4/131408537/7877400.pdf
    • http://files.centralbedsswimsquad.com/uploads/1/3/2/6/132681617/3166659.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/jikalujenegelaperi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/74389741540.pdf
    • https://cdn.shopify.com/s/files/1/0431/7714/8571/files/xuleba.pdf
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/calligraphy_paper.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/27472910591.pdf
    • https://cdn.shopify.com/s/files/1/0434/1812/4445/files/5484160858.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/4108435163.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/miligidesojekonig.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/3344176920.pdf
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/5061660664.pdf
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/lipurekilobovobisepet.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_off00006636.bin
83f4af42185218bf5978590fd42f68665a57eb07607a2ec93f9c594b67e5f6e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6636 5200 bytes
font_01_sfnt_off00007805.bin
969059e43417238bdf06c656e932fd595db4cbebd008b11c6ebecf19cbbe6772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 15512 bytes

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