Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8644b46d82b04ac…

MALICIOUS

PDF

48.3 KB Created: 2020-08-31 13:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5524f1cf0e5ecd2ca16f0ec99010a0f9 SHA-1: 3b67194f7b6e415f42abee3cc1590de4ad7f9c3e SHA-256: b8644b46d82b04acc76a454d852b859ccb5825d64ffbdc8c8770428acaa04682
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same lure text and URLs as found in the heuristics, reinforcing the social engineering attempt. No scripts were extracted from this sample.

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/wix?keyword=world+of+warcraft+oil+rig
    • https://static.usrfiles.com/ugd/b8c837_01abae187c814641bd7c5b67a3d3278f.pdf
    • https://static.usrfiles.com/ugd/2f7815_6eb4081c44c44d56b9a3af44f53a3392.pdf
    • https://static.usrfiles.com/ugd/b8c837_3192a14a0fbe4f5593de9274581fa9d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf657aff94a542339eabca4ba8f2a807.pdf
    • https://static.usrfiles.com/ugd/739437_a030d3d176f54064b47cb057552f8d86.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/20549906082.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/sowexediz.pdf
    • https://cdn.shopify.com/s/files/1/0466/2801/2197/files/msi_afterburner_laptop_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/5512143110.pdf
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/pojude.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_off00008039.bin
1c8354bd4f8e0460778128d1b6badcb676ea3aca8387d4c303e51de5676008ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8039 5116 bytes
font_01_sfnt_off000091c9.bin
6368b729d4b0098cb834a4400531b269ee48c7633c8da04fefc6f5c18c25f883		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C9 10352 bytes

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