Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0e56f906fbb5a2…

MALICIOUS

PDF

47.0 KB Created: 2020-08-26 04:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a70dde001a685ffd6c7e4fc0faef4765 SHA-1: 6d584be5dc6fa83e68419d0812a68f1eda85118f SHA-256: 8a0e56f906fbb5a220743352f68b559759a187f97df11e1ff5935a3f751dac12
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves leveraging these links, potentially to redirect users to malicious sites or to engage in SEO manipulation.

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.cc/pify?keyword=buhler+meaf+manual
    • http://dawuke.juliaremondini.com/uploads/1/3/0/7/130776769/f0568bcc51f8.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/waximoganelipejufefumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/katuxuzakumetusunizos.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9069/files/.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/ted_public_speaking_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8519/files/28708081916.pdf
    • https://cdn.shopify.com/s/files/1/0429/7805/0201/files/resamefogufanifub.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/77254465170.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/98524702806.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/cook_essentials_pressure_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7705/0272/files/vodixo.pdf
    • https://cdn.shopify.com/s/files/1/0466/7411/6773/files/70993559959.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_off00007bda.bin
267019c8239613a02a8f34a4350890d4ca32b62e206f284b60228bbc6148ef4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDA 4880 bytes
font_01_sfnt_off00008c4e.bin
c3a0d5047917d91d2d96c3a57a14adf01d137e5ac54d9acf2323961c38e7704c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4E 10428 bytes

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