Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9432ccf2c34615…

MALICIOUS

PDF

38.5 KB Created: 2020-08-23 11:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77307a9f7b8e22b6fe721d69a12c8eac SHA-1: 7536a5a2d6dd7dd2a83c8e7ac84a758de50ecea6 SHA-256: 3d9432ccf2c346152302a91eefa003008fb044266132dd0bfa15031b24f8cdb9
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to containing a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=outlook+email++frequency', is flagged as a known malicious redirector. The document body contains garbled text, but the presence of the URL and the heuristic firings strongly suggest a malicious intent, likely related to phishing or malware distribution.

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=outlook+email++frequency
    • http://bibumep.shinnbros.com/uploads/1/3/0/7/130775934/tikogup.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/aromatherapy_massage.pdf
    • https://cdn.shopify.com/s/files/1/0444/4487/6966/files/types_of_aircraft_wings.pdf
    • https://cdn.shopify.com/s/files/1/0433/4256/1433/files/bebusolumakezovepava.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/paypal_buy_now_button.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6065/files/pagubowenevimamabekuke.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/8351961512.pdf
    • https://cdn.shopify.com/s/files/1/0431/4618/2822/files/.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/pizus.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_off00005aff.bin
16da48d5f4ee3300595550f713fd323a2b778905de4ce40a1137543fa4c98858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFF 5168 bytes
font_01_sfnt_off00006c8f.bin
070435652a598a2c60a8fc0e5eb58251d7104cd69fc05b7aa7d51931390deb1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8F 9752 bytes

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