Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfeaafbce7ffdd1…

MALICIOUS

PDF

60.4 KB Created: 2020-08-12 12:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87c487f84b0d0ca8ad3d68431f237efb SHA-1: 66c8f681752f61edbed10344c1eb71fbcdad76b6 SHA-256: 1cfeaafbce7ffdd12e590cbe1b0b7ad5d371b82dc8836c3facbcb1568ff01f1f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=risk+1959+rules+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The file was generated by wkhtmltopdf, indicating it might be a crafted document rather than a typical user-generated file.

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=risk+1959+rules+pdf
    • http://files.teevo.co.uk/uploads/1/3/2/6/132683088/c54788fedcec.pdf
    • http://files.michaelfridgen.com/uploads/1/3/0/7/130775965/77771da3f05dac3.pdf
    • http://files.headlandparkartistprecinct.com/uploads/1/3/1/3/131379503/7329998.pdf
    • http://files.0frenchpolishing.com/uploads/1/3/1/6/131606405/2725823.pdf
    • http://nilaji.mtcarmelchristianacademy.org/uploads/1/3/1/4/131407089/76c3c2c.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/14567737910.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31903895201.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/amortissement_linaire_et_dgressif.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/dejofekerovi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/cambridge_english_advanced_plus_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/tobovimenusamopuget.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/gmat_exam_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/discord_how_to_screen_share_with_sound.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/tigabotu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2749/files/motorola_apx_8000.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56666804065.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_off0000af25.bin
3dca6f684d5088a1b967ca7ab8da7cc8c07ab4f2a15cd6f13434c81c45f7cc31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF25 5228 bytes
font_01_sfnt_off0000c104.bin
251823a9b6cf2310ec5850131228c8aeb2f1bcb1106e131e0e438c9bc131b103		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC104 10420 bytes

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