Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c5335e17f4e9f6…

MALICIOUS

PDF

41.6 KB Created: 2020-08-29 03:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db8f689c73cf94d9c3b9ab058f44922a SHA-1: f6a42edbb828dbcfe1012884663a50242c5a9bad SHA-256: 69c5335e17f4e9f6b820176a8aed31587b8dca6f737f282513446537d79e4c1b
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/wix?keyword=skam+italia+temporada+2'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to malicious infrastructure.

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/wix?keyword=skam+italia+temporada+2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0864/5541/files/aditya_hridaya_stotra_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/99260719840.pdf
    • https://cdn.shopify.com/s/files/1/0431/6089/5650/files/30418278274.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec1581671e9f4cbabdd2bf6ea3278440.pdf
    • https://static.usrfiles.com/ugd/b8c837_31fc0fcb3b1d465e91de6cf2b2052538.pdf
    • https://static.usrfiles.com/ugd/b8c837_c28c53739d2646eeb379d4aa4200b4ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9f20112b7ef404e8736a04c8652b97b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d46246278af41a0b8c48b5e2f54b59c.pdf
    • https://static.usrfiles.com/ugd/b8c837_854c2fd46a664c888cd916e048a33000.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f0678bcc89d460ab75901da9b38828a.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/navexulup.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4512/files/vomuxaromozu.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_off00005ec8.bin
42e730181f1a3279b352ea2d37f0d41327f4b13945beb577bb3fe2aeb4997a6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC8 5228 bytes
font_01_sfnt_off00007076.bin
9909446aada1d0b126f40a3efdf2efab9ba156d48bd6143fb20de6e1453b6cf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7076 13276 bytes