Malicious PDF — malware analysis report

Static analysis result for SHA-256 845c65272cc095d3…

MALICIOUS

PDF

42.5 KB Created: 2020-08-05 17:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5857f6672ddd1b017cf4f0e6d6c01e06 SHA-1: 6a1efc290a3f41f911171b1dc4e9348d564caa38 SHA-256: 845c65272cc095d32182727aebcff55dbcfd6b8f74610c98b5f7146e4bed7e79
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, identified as a link farm, designed to redirect users to external websites. One of these links, 'https://ttraff.ru/pify?keyword=picadura+de+abeja+manejo+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking malicious links. No scripts were extracted, limiting further analysis of the payload.

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=picadura+de+abeja+manejo+pdf
    • http://files.academyjuniors.net/uploads/1/3/2/6/132696233/rowebemuxo-bijejowapoja.pdf
    • http://files.nancebmecleaning.com/uploads/1/3/1/4/131453907/9830008.pdf
    • http://files.geyserlandcatclub.co.nz/uploads/1/3/1/4/131453034/gabiruremuzamef.pdf
    • http://files.atmltharris.com/uploads/1/3/1/4/131438483/9052470.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/banner_maker_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/building_materials_short_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/79444668910.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/sedona_10_day_weather.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/27263888480.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/174829664.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/56675610928.pdf
    • https://cdn.shopify.com/s/files/1/0436/6820/9817/files/44073893968.pdf
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/pimesas.pdf
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/5220009410.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/noxamomisoki.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_off00005801.bin
b97f3ed46c441eb9ddd2c0cb6b51732850e082ecbdf0cb2a49b1284e7a95a61e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5801 5108 bytes
font_01_sfnt_off00006930.bin
553d4a3512194019bf117505f08bd513b793bf2c3854efb593b7b674673bfb7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6930 11080 bytes
font_02_sfnt_off00008d75.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D75 4324 bytes

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