Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8aa590e4a60d055…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 06:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d77c1485a1cb1104f85c5b9c404dbf0 SHA-1: 715583137896eeb3ca73dc79c14652684c7ed8b1 SHA-256: e8aa590e4a60d055478d2a3783b8e6e27b7cebde8d44b5fcf1d25a9c8754107c
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body and metadata suggest a lure related to software setup, specifically 'Us cutter mh 871- mk2 setup'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The presence of numerous other PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning technique to obscure the malicious link.

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=us+cutter+mh+871-+mk2+setup
    • https://static.usrfiles.com/ugd/0cd3a8_760ffdc7de564283ac8591ec1b8139f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f8e99e0d2064a16a84b997467f63680.pdf
    • https://static.usrfiles.com/ugd/55cc32_fbf3e77092ee427aacb6dc72c2b5c24f.pdf
    • https://static.usrfiles.com/ugd/26938b_088ea5039d394954b6ea487b7efb7524.pdf
    • https://static.usrfiles.com/ugd/f1780b_bb8466a15474418f897b75294c1ce381.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/types_of_groups_in_social_group_work_practice.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/c_al_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/74406109721.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/ben_10_video_game.pdf
    • https://cdn.shopify.com/s/files/1/0436/6496/5782/files/xaviluxesaxifabepimivitu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/76137823090.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/julojimonewojovamebewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/43166666337.pdf
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/tekixoxanazofesefimez.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_off00006440.bin
184e2ccad8a97eb58bf12b8b41b57314bf8ad329ca790c31bae026e80ec1002e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6440 5476 bytes
font_01_sfnt_off000076d8.bin
ef0f17a74ee95a582d3929a1247b29374dbe2cbe68f10bbfb32577e08e925c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D8 10128 bytes

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