Malicious PDF — malware analysis report

Static analysis result for SHA-256 915531999b859765…

MALICIOUS

PDF

35.7 KB Created: 2020-08-20 08:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91bf6d510de1c8cb76814316203c89c8 SHA-1: 670d4b07e687ef4aafce25986e47cafd6a10cb55 SHA-256: 915531999b85976510c8971bd2f05b31717858f8d905197b249a5b15562cfa52
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites. One critical heuristic identified a link to a known malicious redirector, and another identified a link farm structure. The document body contains garbled text but also includes the URL https://ttraff.ru/pify?keyword=bansidhar+ke+bhojpuri+gana+dj, which is flagged as malicious. This suggests the PDF is designed to redirect users to 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=bansidhar+ke+bhojpuri+gana+dj
    • http://files.otero2018.com/uploads/1/3/2/3/132303147/lefelaguwi_wadovipoda_pusuwu.pdf
    • http://ruwan.thesmithclinic.com/uploads/1/3/2/7/132710621/5084890.pdf
    • http://files.bensonbunnies1971.com/uploads/1/3/1/3/131379213/mefigesoge-gomomojivuteja.pdf
    • http://files.bccupcakery.com/uploads/1/3/0/7/130738850/xonofikavunimuzisegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/sonifukusalotegaba.pdf
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/15158042216.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/19880844906.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/bell_f20_bike_computer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/6252/4069/files/viwiwifopiferisalisafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxumadebamapetutorobegew.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/lodovolinopivem.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/honda_cbr_954rr.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/furefamamerogufipedowuko.pdf
    • https://cdn.shopify.com/s/files/1/0436/0398/4547/files/59250139495.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/business_plan_for_food_restaurant.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/l_archeologia_classica_un_introduzione.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_off00004d2a.bin
b3082292d8d662c3706a938bc367f28b736269eb70226159490c65ff47f9e76b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2A 5520 bytes
font_01_sfnt_off00005fde.bin
2af4bf0d926dacbc18e3523c3d6d4e374cdb265895438e1c9e365abdf9d231a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDE 10092 bytes

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