Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cad609cab50c68d…

MALICIOUS

PDF

40.6 KB Created: 2020-08-15 02:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a84e91e6c4058ff7cb8022b023cfd77 SHA-1: 3b41b6d38e9031bc010ea4e7c27960478510951b SHA-256: 9cad609cab50c68dc69cee207419fb0c98e7f08d933f0c7f72d52a1d82a62852
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is presented in the document body as free sheet music. The file also contains a large number of links to Shopify domains, likely part of a link farm to improve search engine ranking for the 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=free+baritone+uke+sheet+music
    • http://rodegixi.systemskateboards.com/uploads/1/3/1/8/131871453/6da8f.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/89722870872.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6362/files/67626248214.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/tiguxajorenikuxuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/waderivopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3587/files/88034472814.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6472/files/negikozometa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1299/files/16488668468.pdf
    • https://cdn.shopify.com/s/files/1/0447/7334/3383/files/tokyo_metro_map_english.pdf
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/12906519372.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8545/files/toxoplasmosis_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/appraisal_in_hrm.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/43817130074.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_off000060b2.bin
6dbeeefb4da861a319ee1e481ab4ff1ce52c9af878cdadb2df15108f5143b446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 5168 bytes
font_01_sfnt_off00007212.bin
83ce5f604f92887a164a08101ddbb8b4f18e44ee1e36275b89d002f97f8486ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7212 10412 bytes

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