Malicious PDF — malware analysis report

Static analysis result for SHA-256 e302ad72d5f949d8…

MALICIOUS

PDF

43.8 KB Created: 2020-09-11 02:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42d9a4f6ec052c7566a31ac06671c085 SHA-1: 2aae5a8749bb6ec9e5b2ae9ce206a6b661a085af SHA-256: e302ad72d5f949d834d1f039d2959ca642bdbb1b66e4cfc12908fd8fd4a316dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.link/pify?keyword=basic+hematology+questions+pdf'. Another heuristic indicates a mass external PDF link farm, with many links pointing to Shopify domains. The presence of a 'LOLBin Run Command' heuristic suggests potential execution of scripts or commands, although no specific script content was provided for analysis. The document body contains garbled text but includes the suspicious URL.

Heuristics 4

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.link/pify?keyword=basic+hematology+questions+pdf
    • http://files.kmmauthor.com/uploads/1/3/2/6/132682787/ba53bc803d05.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/brand_awareness_social_media_and_digital_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/mubutifimixag.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/powershell_generate_random_string.pdf
    • https://static.usrfiles.com/ugd/f8de3e_2b713a4371a541d494941982255d66be.pdf
    • https://static.usrfiles.com/ugd/1c90dc_fd48c838feb94154a594bc5bf3559153.pdf
    • https://static.usrfiles.com/ugd/0cd019_cab656623f1844618073c0edeb2fede6.pdf
    • https://static.usrfiles.com/ugd/b8c837_107871a511b54473afb38051ef128d10.pdf
    • https://static.usrfiles.com/ugd/87a178_0fbcc48fd31d444ab78eb3ce6db2e654.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_d8faaa540886425fbbe0568c95a85cfc.pdf
    • https://static.usrfiles.com/ugd/1a89c8_e8d70eeb1fef4b968939066116cf8308.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_off00006be7.bin
e895342a254ca49150a63b1d041b27ccc02d1f93c6a36a6295c36a9a1b6277c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 5752 bytes
font_01_sfnt_off00007f64.bin
46fc4363f11119463915c267924ebab142429ed4f8b88544595770807f38efff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F64 10404 bytes

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