Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3da08b8f0ce0b7…

MALICIOUS

PDF

60.9 KB Created: 2020-08-23 14:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae05a0c58db6ba57dcf05ba2e8e380a SHA-1: 7422cec18297cf2addd7011f0da54282fb40053b SHA-256: fb3da08b8f0ce0b7b052769ba28bde51f51867459435b880bbf1c4a1b1e4e595
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. It also exhibits a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The document body, though partially corrupted, contains the target URL and mentions 'Dwarf fortress guide to rock', suggesting a lure. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded 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/pify?keyword=dwarf+fortress+guide+to+rock
    • http://begemi.ms158qmusic.com/uploads/1/3/1/0/131070357/1bc754.pdf
    • http://vozeg.melissaingle.com/uploads/1/3/1/3/131380429/jorigulidopa-xowidajelewobu-goxubumozudebop-garegosofaj.pdf
    • http://dazodo.20thlondon.com/uploads/1/3/2/7/132740214/magadawa.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4968/files/dogelajitakenuxopubevopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/microsoft_windows_networking_essentials.pdf
    • https://cdn.shopify.com/s/files/1/0428/5677/5839/files/peramatabip.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/jawaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/36289730978.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/85062432720.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0411/files/19159677116.pdf
    • https://cdn.shopify.com/s/files/1/0430/0757/4179/files/wefepopodexamomevarimive.pdf
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/zisagupakulet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a2c9.bin
6826e43faf076dcb72023e8ca6a50704d195a1675187f34a95928450d5bd5e46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C9 5088 bytes
font_01_sfnt_off0000b443.bin
5f48f303923ae0d45db9bedad1444193ffc86eb7789f6b6a9e6521a1e17b1d45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB443 10804 bytes
font_02_sfnt_off0000d93b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 4324 bytes

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