Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8afb60797054f6…

MALICIOUS

PDF

41.2 KB Created: 2020-08-09 13:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bb05fb813ce4796f1bc20c0d49af982 SHA-1: 2ac38f1f7d877d11d992c9fa3168ce46a49a0b4f SHA-256: 4d8afb60797054f6f954174b582c5b10a90f6b80748a5cb98717eb8c096b7460
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm and a redirector. The primary URL, https://ttraff.ru/pify?keyword=pdf+ausf%25C3%25BCllen+erstellen, is flagged as malicious, suggesting it's used to obscure the ultimate destination of the attack. The document body itself is heavily obfuscated and contains numerous URLs, many pointing to Shopify, likely as part of a link farm to improve search engine ranking for malicious content.

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/pify?keyword=pdf+ausf%25C3%25BCllen+erstellen
    • http://files.lusherartsandinnovation.com/uploads/1/3/1/3/131379591/tasikuziva.pdf
    • http://gujedem.toddspianoservice.com/uploads/1/3/1/1/131164250/zovilos-lajebapiro-forewusifiwofa.pdf
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5388/files/clinical_medicine_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/math_in_the_modern_world_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/cahills_vs_vespers_trust_no_one.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/gukisiwibezedopepa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/favaretu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7720/files/fegigukipidunabeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/49164084917.pdf
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/fivejevavekadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/47829062279.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/lavuduz.pdf
    • https://cdn.shopify.com/s/files/1/0435/4090/6135/files/duvelofomufanibozifu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3001/8210/files/jg_bar_10.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_off00006203.bin
6cdf5338ba3e7de7d6a504d3a764662b6b6f05c11ae6fd654e9d29828838059e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6203 5020 bytes
font_01_sfnt_off000072f0.bin
ed1734f295633bbce0d8e8948fceb6becd3fc7efa82ba59c4a9d75e7e354a082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F0 10928 bytes

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