Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc174333eaba6eb…

MALICIOUS

PDF

44.0 KB Created: 2020-07-24 14:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4187549d59a6b2c6f0b27c13bba65132 SHA-1: 4e708f7022b30f3082259e1771f76e9ea0751c83 SHA-256: 2fc174333eaba6eba0c657664375da5cff02b6da01671d320686aa63b8cc8473
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains with numeric or book-related slugs, suggesting an attempt at SEO poisoning or link farming. One critical heuristic firing indicates a direct link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no clear user-facing text. The primary attack pattern involves redirecting users through malicious infrastructure.

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/wb?keyword=eats%20shoots%20and%20leaves%20full%20pdf
    • http://files.patricedworkin.com/uploads/1/3/1/6/131637131/391527.pdf
    • http://files.choosinghealth.org.uk/uploads/1/3/2/3/132302944/1451993.pdf
    • http://files.bcrenergygroup.org/uploads/1/3/2/6/132682039/ded06b.pdf
    • http://files.jonathanacollura.com/uploads/1/3/2/8/132815752/4556185.pdf
    • http://files.wainfleetskating.ca/uploads/1/3/0/7/130739117/zakimesenamom_fuwegi_bitixijajap_busimirafud.pdf
    • http://files.bcrenergygroup.org/uploads/1/3/2/6/132682039/ded06b.pd
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/51581410300.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/merasodotanukomonasimipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/dilafinukowudelozes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/43857413043.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/nemorejabul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89120683065.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/vuladuzawup.pdf
    • https://cdn.shopify.com/s/files/1/0437/1415/0565/files/zemizik.pdf
    • https://cdn.shopify.com/s/files/1/0432/0958/8897/files/7564264345.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/lodulubamukipasuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/pawobowapefujamulo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/74095735360.pdf
    • https://cdn.shopify.com/s/files/1/0428/9049/4119/files/jogeboradinolitax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.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_off00006f2b.bin
c6bf76f244464622fd4e4a9a616f2d07a1403612dd67651726082a3c2b95bd54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2B 4884 bytes
font_01_sfnt_off00007fc9.bin
4257778196f48b6b1317c989f92be36a0d4b061cba5c4f7e290ee81830f1daf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC9 10192 bytes

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