Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7f1d770288a186…

MALICIOUS

PDF

73.6 KB Created: 2020-08-17 18:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 937886714b5f6944192f500f755d8f32 SHA-1: ac0af18286fc4562afa8e3de91316221ae0b29bc SHA-256: ff7f1d770288a18604aabf53903b0efc5aa67c2a383da54d4db1c111ee9f06f4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The embedded URL in the document text also points to the same malicious redirector. These elements indicate a campaign to lure users to malicious sites.

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=cannibal+holocaust+300mb
    • http://files.judithhand.net/uploads/1/3/1/4/131437378/9e50b84f3d9.pdf
    • https://cdn.shopify.com/s/files/1/0432/4691/1643/files/kenmore_elite_refrigerator_model_795_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/tilegejawoxikuge.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5159/files/cakephp_2_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/angaraka_runa_vimochana_stotram_in_telugu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/55206522781.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/jumofukamex.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/xebet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/random_numbers_r.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_off0000e25d.bin
4aca25c435c529f05162784fca0160902dc548cca602d50e9d64bf499f26fa9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 5296 bytes
font_01_sfnt_off0000f42c.bin
c338acd92a9380d02a4d0d6a8e2b8e20d7bf42b7d7d0351098ff2826e95f7364		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 11004 bytes

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