Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc3f3877a8cd8cc…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 01:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72d8e3085189a650b0f4cedcf9005235 SHA-1: 56c089ab7b794392d6c88ce430314f1e352a3afd SHA-256: 4cc3f3877a8cd8cc3d89743e6c6d574bbe8743d455726acd99bdaa77c84e2a29
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, pointing to 'https://ttraff.ru/wix?keyword=bun+b+trill+album+download'. This URL is presented within the document body, suggesting a social engineering lure to trick users into downloading content. The file also exhibits characteristics of a link farm, with numerous embedded links to PDF files, many hosted on Shopify. The primary malicious URL is the most critical IOC.

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=bun+b+trill+album+download
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/sc_st_atrocities_act.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/37160688914.pdf
    • https://cdn.shopify.com/s/files/1/0461/8964/1891/files/harbor_freight_manual_battery_charger.pdf
    • https://cdn.shopify.com/s/files/1/0435/1344/6564/files/bowaraviwoxutizojamasuj.pdf
    • https://static.usrfiles.com/ugd/87a178_25d9c568d8024f2894392a00f120ff70.pdf
    • https://static.usrfiles.com/ugd/f63f29_847b94c179574cdb81b7876c3a9dcdf4.pdf
    • https://static.usrfiles.com/ugd/286fb8_51f83af7cedc4e42a469e5b3f1e07c19.pdf
    • https://static.usrfiles.com/ugd/b8c837_b11b58d3bf9745a9a4d485a727bd02b2.pdf
    • https://static.usrfiles.com/ugd/5b9a87_4b4da1d7b10b406cad895b050504eab2.pdf
    • https://static.usrfiles.com/ugd/105a8c_e0c009e4d6284014ad099f5a5eb1eff6.pdf
    • https://static.usrfiles.com/ugd/1ee69b_330115e354b6494b94bf4c5442c8e268.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0077/files/3d_video_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/9074159770.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_off00006208.bin
b4d65df0ec09ad576236af6484b56283f117098b16bd3960111bc951ac9488c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6208 5072 bytes
font_01_sfnt_off0000733b.bin
4b820d1c4afb1b0244fedce101a03690559802b7810b710b72dd2289c8b9b26d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733B 10308 bytes

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