Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb5c676ea7f4f4c…

MALICIOUS

PDF

34.4 KB Created: 2020-08-21 15:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 633b6e05c8b22ef761b20f671967c620 SHA-1: 0d794d4e518b137f89edcd706d1908704bd28bb1 SHA-256: 6bb5c676ea7f4f4c00d9858520d4e59e60de8865c9d664d86d8793ac81db510e
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, however, directs to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the document is designed to act as a link farm, with the ultimate goal of redirecting users to malicious 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=3+alif+lam+mim++full+movie
    • http://files.lodicyclebowl.com/uploads/1/3/1/3/131379830/5c526014450.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/lemonodowegetaxinarigog.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1988/files/23_ejemplos_analogias.pdf
    • https://cdn.shopify.com/s/files/1/0437/5268/5720/files/license_plate_recognition_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/lemajekifediwusamagupapam.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/bcom_1st_year_financial_accounting_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/3055/2474/files/99719376850.pdf
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/jekudinapido.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5221/files/badakimoruwori.pdf
    • https://cdn.shopify.com/s/files/1/0440/0319/7078/files/familia_bovidae.pdf
    • https://cdn.shopify.com/s/files/1/0438/8493/7384/files/joduriraxupojinok.pdf
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/cadence_allegro_user_manual.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_off0000480d.bin
7b857c3570aece9d4ab2ed3e0b0fb022a78357552dff5bd088b22b4ee3f1b96e
pdf-font-stream PDF embedded font (sfnt) at offset 0x480D 4768 bytes
font_01_sfnt_off0000583c.bin
908269bf79277e551355c6a60d44668bb89d1431bf833ba88d2ca04d9933361f
pdf-font-stream PDF embedded font (sfnt) at offset 0x583C 10480 bytes