Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54f2bf6f8a348a3…

MALICIOUS

PDF

41.7 KB Created: 2020-08-20 01:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 428766597db41d2f71bc4d56f1e28bb5 SHA-1: 379cc7e356933c7d67fd2eaeb39edeaa145576ca SHA-256: b54f2bf6f8a348a3ee3f2c6f00fce759e1e579ae3daee6a414723d91e4c65b2c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link and a PDF link farm. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. The primary purpose appears to be directing users to potentially harmful external content through a deceptive pretext of a diet food list.

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=a+blood+type+diet+food+list+pdf
    • http://files.charlevilletriathlon.com/uploads/1/3/0/8/130874001/tixarikiturase_rugaguwabexezuv.pdf
    • http://files.thornhillactingstudio.com/uploads/1/3/2/6/132681482/2340513.pdf
    • http://vunuto.rhymingchemist.com/uploads/1/3/1/3/131383483/8d618.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/98912556557.pdf
    • https://cdn.shopify.com/s/files/1/0431/1977/1799/files/57794134893.pdf
    • https://cdn.shopify.com/s/files/1/0429/3813/8783/files/labonolidasurib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/51023576176.pdf
    • https://cdn.shopify.com/s/files/1/0450/6599/4392/files/complete_core_java_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/kekijurozasowubepap.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/larogixusegikakitidebow.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_off00006641.bin
eeb2939d461b1ed2ac467b27b29b1a1e1c7f26db03525e9f71bff41062f368d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 4960 bytes
font_01_sfnt_off00007741.bin
2b63d315e866247b17f84288b85bc41a444a462050ba64b6a3d40285dd5331fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7741 10284 bytes

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