Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5bbc3d6b56dae3…

MALICIOUS

PDF

43.1 KB Created: 2020-08-06 20:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b56ff7e37678f59c84dd231f55b2f99 SHA-1: 78fd6820e5b289aa7123831e3105bfbfa2992e02 SHA-256: 8b5bbc3d6b56dae31611012fb8a573346ab5c6e803abd1663ccde2142cfdb366
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 'https://ttraff.ru/pify?keyword=canons+of+taxation+by+adam+smith+pdf'. The document body, though heavily obfuscated, contains text fragments that appear to be related to the lure, such as 'Canons of taxation by adam smith pdf'. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm or redirection strategy to obscure the ultimate malicious destination.

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=canons+of+taxation+by+adam+smith+pdf
    • http://files.toastygoat.com/uploads/1/3/0/8/130813898/e310a5f9b8d8a2e.pdf
    • http://files.wickenburgchristianacademy.org/uploads/1/3/1/4/131454262/4959875.pdf
    • http://files.authorajknight.com/uploads/1/3/1/4/131482864/fc75265252.pdf
    • http://files.thewhitehart-bishopstone.co.uk/uploads/1/3/0/7/130739864/4707065.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/goradezodiwerugamotafija.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/riwapuborosakenupegepujod.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/vujosewagekuxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8795/4073/files/duriwajozolopemu.pdf
    • https://cdn.shopify.com/s/files/1/0441/1251/1128/files/74199611810.pdf
    • https://cdn.shopify.com/s/files/1/0428/5385/9494/files/33540358494.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82973104521.pdf
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/rusetojepigifotemorufok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3920/files/cpc_practice_exam.pdf
    • https://cdn.shopify.com/s/files/1/0436/7394/4217/files/adobemaker_for_word.pdf
    • https://cdn.shopify.com/s/files/1/0433/6120/6422/files/83107200666.pdf
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/46187827993.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/36933867052.pdf
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/47103652165.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_off00006ab6.bin
76526c4af33084e88ea48741cf5977a082e09a73c287be149ef6342939635a0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB6 5368 bytes
font_01_sfnt_off00007cdb.bin
c6a7b6306411447e63095e84b0058e3520efc5ffff2b99eeae172bb13178fcfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDB 10160 bytes