Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9431b05c4a6ffc…

MALICIOUS

PDF

55.0 KB Created: 2020-07-30 08:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99992ffbc941b33c534d0066dfb06137 SHA-1: 3bf51696246ccd6b58ed325f82acfe7d4b77b4b0 SHA-256: 3a9431b05c4a6ffcb8fd2a1f1fa5b098b10acaf66e4ea3784ac217dfeb332ec3
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=writing+prompts+for+high+school+students+pdf', which is likely used to redirect users to further malicious content. The presence of numerous links, many hosted on cdn.shopify.com, suggests an attempt to obscure the final malicious destination or to leverage legitimate platforms for distribution.

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.com/pify?keyword=writing+prompts+for+high+school+students+pdf
    • http://files.dasnilanjan.com/uploads/1/3/1/6/131606694/bilelav-buxemut-lelapikokor.pdf
    • http://files.lovebustravels.com/uploads/1/3/0/8/130874642/lejosenaro.pdf
    • http://files.krystinskidmore.com/uploads/1/3/0/7/130739315/waxowowufuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3871/0696/files/34510531462.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/dokuduxosepatazomim.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/65059152883.pdf
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/voloxadevosidafox.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/rogojaboparapipetopilud.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/safamololat.pdf
    • https://cdn.shopify.com/s/files/1/0429/0071/7727/files/pozixojudosuworojiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/40056659645.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/63624491224.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/lekelinavopu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/xufaxogojaraxularaxojim.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/3992/files/980343607.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.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/
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/rogojaboparapipetopilu

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009998.bin
11dccff69280c527bb974d42aaabc367feb26dd021c9bc55bd8eb4785ddb0137
pdf-font-stream PDF embedded font (sfnt) at offset 0x9998 5252 bytes
font_01_sfnt_off0000ab55.bin
9d4fc0202cdf9997bfd63d07a92e74ecac18eac6bdf2c2654b09e0c8e1ddf2d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB55 10380 bytes