Malicious PDF — malware analysis report

Static analysis result for SHA-256 2386b610929a4ce2…

MALICIOUS

PDF

41.7 KB Created: 2020-08-29 06:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f24faf39efcc015c6e883ca9573d11c SHA-1: 7fdab7bac1f111b92cd6272c208e0f9abca82635 SHA-256: 2386b610929a4ce2092e3de575d8206cec7a1ddd559cdbaa5854dadb46e309cb
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the same URL found in the heuristic, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, points to a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, limiting further analysis of the payload.

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.cc/wix?keyword=archaeology+down+to+earth+4th+edition
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/bopipubuwurepid.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8770/files/755932974.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/96931227622.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/88582194892.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/13673991267.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/47804540714.pdf
    • https://static.usrfiles.com/ugd/b8c837_994048fa33ec4893ac1783ee86ab703a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8203ef0571cd4dfb85737d4242eea5e8.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/curriculum_guide_in_music_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/ruropuzonimapifum.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/amulet_book_4_the_last_council.pdf
    • https://cdn.shopify.com/s/files/1/0441/0405/6984/files/11269069158.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7725/files/79200331632.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_off000064eb.bin
ebaa8cbe6c8c252d0f6196da515002ec264176da7d1c7f2b963c78be87a6937f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EB 5296 bytes
font_01_sfnt_off000076f9.bin
73494931450faff9868067c09e38d294ff3dd0ede4197b5dacc0cd4c288d6e0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F9 10304 bytes

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