Malicious PDF — malware analysis report

Static analysis result for SHA-256 268382ba02f22346…

MALICIOUS

PDF

44.0 KB Created: 2020-07-27 13:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b61f39fe652204106971ac64acdc971c SHA-1: 1070a49395ac764c61c3ce7868a965f5a868a74a SHA-256: 268382ba02f22346a3187e0a44e4ae9d574382dd72ba3b919b291d3d0cc7b225
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is used in conjunction with a PDF link farm. This indicates an attempt to lure users to malicious sites, likely for SEO poisoning or to serve further malicious content. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a common tool for creating PDFs from web content, further supporting the redirection vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=valentine%2527+s+day+worksheets+high+school
    • http://files.djjileslmc.com/uploads/1/3/0/8/130813135/dudekobixedi.pdf
    • http://files.sinkpong.pub/uploads/1/3/1/0/131070459/vekugoruju-lumevutavejo.pdf
    • http://files.go2homebrewingsupply.com/uploads/1/3/1/4/131407647/8841350.pdf
    • http://files.homesteadharvestfarm.com/uploads/1/3/0/7/130739593/7103887.pdf
    • http://files.sossanantonio.org/uploads/1/3/1/4/131407138/8449f743.pdf
    • http://files.go2homebrewingsupply.com/uploads/1/3/1/4/131407647/8841
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/72618400497.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/89789308384.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/38025857734.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/65202118257.pdf
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/bufonulewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/zotujikasedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8194/files/19324973094.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/nanemepofitalire.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/taxijejolidodusovotumabi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/59887345195.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28664871254.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/jixamilosijebomonib.pdf
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/lipedowufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/bozuf.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_off00006e4b.bin
bad93d763f6a20858b8005c997127725891aecd03c3979b9498e563c309df52b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4B 5248 bytes
font_01_sfnt_off0000803a.bin
a9688810b27305fd7ce4a06e3a7f19227115cc4fef44d7b1185497f08428050d
pdf-font-stream PDF embedded font (sfnt) at offset 0x803A 9864 bytes