Malicious PDF — malware analysis report

Static analysis result for SHA-256 c907a64c276f7dde…

MALICIOUS

PDF

36.0 KB Created: 2020-08-03 13:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b01cbed5a85bf860db5543bea7330fe3 SHA-1: d72b8759f83067f52afd4d4c625f5b15b21190d6 SHA-256: c907a64c276f7ddedc7f0994d9451c564e7ecf59d6da5e60de1e4890918da7c7
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though malformed, appears to be a lure for a 'reasonable faith pdf free download', suggesting a social engineering tactic to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=reasonable+faith+pdf+free+download
    • http://bikizi.wfgcompass.com/uploads/1/3/2/7/132740892/subamiles.pdf
    • http://files.flawlessfrenchies.com/uploads/1/3/1/4/131482826/ad44ddf4.pdf
    • http://files.playtherapyworks.com/uploads/1/3/0/7/130775503/xogixo.pdf
    • http://dexopodu.tsmega.net/uploads/1/3/2/7/132740805/jipuka.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/23059295447.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/14540222454.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0439/1596/8680/files/27172329615.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/62587346163.pdf
    • https://cdn.shopify.com/s/files/1/0435/5126/0823/files/72470049178.pdf
    • https://cdn.shopify.com/s/files/1/0430/8955/9705/files/11714965524.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5569/files/kokok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/64961825310.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/werirul.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/kexilewuzola.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/bedugiwubomezatukesip.pdf
    • https://cdn.shopify.com/s/files/1/0433/6448/3240/files/kumibujanumumu.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_off00004ec3.bin
1b49e8aa95599f1eed8cc5f413bf96dced49e50d102f62aafa2c099d8956f8c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC3 5368 bytes
font_01_sfnt_off00006109.bin
584d26f04ebd61ab04cb4b49b120b0d6873090752927cb6a0c4e1e20552719c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 9932 bytes

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