Malicious PDF — malware analysis report

Static analysis result for SHA-256 198bcd3e62e3b55c…

MALICIOUS

PDF

38.9 KB Created: 2020-08-27 15:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 233cb583b3a711079ad66187e73f191e SHA-1: 73958122afb8bb74495b4051287873eb759dc133 SHA-256: 198bcd3e62e3b55c5cc31d48273e07622075c50facb4843f9946662b8d38cc5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=dcuo+ice+tank+loadout', which is flagged as malicious. Additionally, the document exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The ML classifier strongly indicates maliciousness, and the embedded URLs suggest an attempt to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=dcuo+ice+tank+loadout
    • http://files.creativeguitarstudio.co.uk/uploads/1/3/2/6/132695543/9658403.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/1554/8573/files/police_report_houston_tx.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/command_line_reference.pdf
    • https://cdn.shopify.com/s/files/1/0434/4466/6529/files/gutujujidupa.pdf
    • https://cdn.shopify.com/s/files/1/0440/7607/3125/files/blood_agar_media_preparation.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9164/files/tekojoram.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8845/files/57314150184.pdf
    • https://cdn.shopify.com/s/files/1/0431/9785/7954/files/vebogud.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/bible_english_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/45740671302.pdf
    • https://cdn.shopify.com/s/files/1/0436/7004/4825/files/caso_ayotzinapa_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/walomonokitififugeluneja.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/bewizasujo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c20.bin
0cd11f9da02e7c05e1607b8ae40ca0ff5e720df02ffeb5511dca38f034e55705
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C20 4720 bytes
font_01_sfnt_off00006c46.bin
c0a7bbc710e3b96155d64b83eb7c4c74a34435e7f789c5cedc9ca4967d5c529e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C46 10256 bytes