Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff035f411a6d46e6…

MALICIOUS

PDF

43.0 KB Created: 2020-09-03 01:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0322e7b058d7c643e97b2ad6343686f6 SHA-1: 9350850ef67f4191f3e246d74823f4691a3c79b4 SHA-256: ff035f411a6d46e6c161efda06a5be53bd164c686265f96b18e9a96723ceca20
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to external PDF documents hosted on Shopify. The primary malicious URL is ttraff.ru, which is likely used to redirect users to further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=circle+theorem+exam+questions+and+answers
    • https://cdn.shopify.com/s/files/1/0467/5600/4003/files/china_e-_commerce_industry_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/teviwalisoxojogonip.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/27289667998.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0457/3544/4646/files/xobikotevatodo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/notification_badge_app_icon_android_example.pdf
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/56678293973.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/jebuxobodugejuzurug.pdf
    • https://cdn.shopify.com/s/files/1/0440/6453/8776/files/willmington_guide_to_the_bible.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1289/files/vevepevo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/jilawijusen.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9595/files/shreemad_bhagvat_geeta_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/61097810062.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/12385351601.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/tuwibapesutet.pdf
    • https://cdn.shopify.com/s/files/1/0450/8627/7784/files/38866431652.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_off00005cd8.bin
4f4bf23a808bd6caef40c713c3ad14de2905451cef1a48ed69dcc61cefaa5363
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD8 5372 bytes
font_01_sfnt_off00006eee.bin
6967b163aab7518dc30e82ce99b84cd7f69d21f81cf4225d8f08db93334c72db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEE 3128 bytes
font_02_sfnt_off00007bb1.bin
d55a38832d41b4acb0b0ea2ab41a88103120af96227a3c7c46a365a0248d7fb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 10180 bytes