Malicious PDF — malware analysis report

Static analysis result for SHA-256 b675f689c34211aa…

MALICIOUS

PDF

44.6 KB Created: 2020-08-28 11:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82f959e67adac4f5a316deb05a0dc92f SHA-1: 11fa2e9d07be35ec34b50d2ce5419f70af7ca89c SHA-256: b675f689c34211aa36b374409961e5c1ae4afd40cdbbaaf8f036fc6ed938e196
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though partially corrupted, contains text related to a 'Sims 4 fishing guide' and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which point to Shopify domains hosting other PDFs, suggesting a broader campaign to distribute content or traffic. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=sims+4+fishing+guide
    • http://files.inkdhair.com/uploads/1/3/0/8/130814132/kilizuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/0082/9848/files/ender_3_stepper_motor_specs.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/burda_style_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/8828/8670/files/5_dysfunctions_of_a_team_discussion_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/how_to_program_a_directv_remote.pdf
    • https://cdn.shopify.com/s/files/1/0433/0894/1467/files/hotstar_app_for_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/fuxafisebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/67101786594.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94215193789.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/76934474679.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/8301191272.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000650c.bin
52e3cf5d0d28f0c6c1b3c02763655c731d88fdad67347ad77d3b153c3fd90c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650C 4868 bytes
font_01_sfnt_off00007568.bin
2afa13d96a5dc07facf5f18ce88ff2f70f3b49e85a666128e7812ca20ecffade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7568 10128 bytes
font_02_sfnt_off00009817.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9817 4324 bytes

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