Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9071a026d6fd73b…

MALICIOUS

PDF

44.7 KB Created: 2020-09-01 22:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 658316937b3a4fbff6f8a9e4916824a3 SHA-1: 6df4c96f8a8e6e24209d589cae430ac64b2476d7 SHA-256: d9071a026d6fd73bc26dc821a7f92046ad5232a68e3481a60201839c0217aeed
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=urinary+system+diseases+worksheet'. This URL is presented within the document body, disguised as a worksheet title. The presence of numerous other benign PDF links suggests a link farm or SEO poisoning tactic to obscure the malicious intent. The primary goal appears to be redirecting the user to a malicious site.

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=urinary+system+diseases+worksheet
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8833338052.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1412/files/51702505172.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_5042bf3a0a95491ca5b0d3b389ce4965.pdf
    • https://static.usrfiles.com/ugd/cd79e3_ea04315829f3430a92795266107af235.pdf
    • https://static.usrfiles.com/ugd/a838c0_5c81529e3d1b4a28aed91412acb583d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cd207c692534bf2a75d0e5b8aa3f34d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e7b6f4437a048e1b1b8aa2b02122d92.pdf
    • https://static.usrfiles.com/ugd/dc51bb_fd389b3e49b24ea999d9574601423b34.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/12287594161.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/gigaxinovivikukugifesapo.pdf
    • https://cdn.shopify.com/s/files/1/0447/6128/4757/files/pandora_s_box_6_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/15298911636.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_off00007113.bin
f9351d136827ade376fb0a2e488faa4622350af1451b41028d6167abda3b4f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7113 5280 bytes
font_01_sfnt_off000082f5.bin
3deb10813ce10b99d41dc6b6839f215be11fd31f17746c59f188323c133d5e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F5 10256 bytes

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