Malicious PDF — malware analysis report

Static analysis result for SHA-256 85285f3c647d034d…

MALICIOUS

PDF

45.0 KB Created: 2020-08-31 21:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff235e33175c177cab0663aaf119d66e SHA-1: 644092f74250f9e320a894d89f36cadeeba2ea0c SHA-256: 85285f3c647d034dc5e3c641d2c7b4052140046ef047752c70a37f708f9e87ff
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=creeping+eruption+adalah+pdf'. Additionally, it exhibits a PDF link farm pattern, with 16 external PDF links, the first being 'https://cdn.shopify.com/s/files/1/0431/2144/2977/files/calling_doctor_amelia_bedelia.pdf'. This suggests the document is designed to lure users through search engine results to potentially 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/wix?keyword=creeping+eruption+adalah+pdf
    • https://cdn.shopify.com/s/files/1/0431/2144/2977/files/calling_doctor_amelia_bedelia.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/lukufuruvereleda.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0711/files/the_coldest_winter_ever_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigorekotat.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/the_wolf_among_us_full_game_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7625/files/39888730807.pdf
    • https://cdn.shopify.com/s/files/1/0434/7556/6749/files/calligraphy_letters_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/jojabibaxemimoz.pdf
    • https://static.usrfiles.com/ugd/affb4a_09fc24c95b774c16bc787b3c8fdd4f7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_26450e6b92e34791a8b4ded296ad509b.pdf
    • https://static.usrfiles.com/ugd/b8c837_30bda6cbade347fe9b4b4577d96426f8.pdf
    • https://cdn.shopify.com/s/files/1/0457/0336/4764/files/antenna_theory_analysis_and_design_balanis.pdf
    • https://cdn.shopify.com/s/files/1/0459/7419/2295/files/brihaspati_dev_ki_katha.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/optimist_creed_christian_larson.pdf
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/70383502118.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5352/files/solulisumunidaterike.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_off00006e73.bin
896bfb0d3ad15b9c67bab7d3c20de7e9e340d6414098adaaa21d8652460d76d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E73 5028 bytes
font_01_sfnt_off00007f85.bin
859ba455fadfca08ee2360a2adeb6d0088005085cd0df2178550a299cac6739f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F85 13884 bytes

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