Malicious PDF — malware analysis report

Static analysis result for SHA-256 13cf1b2ff69c6db1…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 11:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb78624d4477ab779b2d9a6a07cece47 SHA-1: 83c70094d9df5d80a097384c2cdec0d8c7b06ad8 SHA-256: 13cf1b2ff69c6db115ff4ae61e9b5cf80fc939ed43c3596962832a7e9330ddb8
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, embedding numerous links to other PDF documents. The document body contains obfuscated text and the primary malicious URL, suggesting an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

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=logitech+m315+vs+m325
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_a050d340367d4882b5b6f33fa01fca37.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca0ca09d60ed4d4681a44e90f1a216d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba86afe613074227a05aa2af7d7f609d.pdf
    • https://static.usrfiles.com/ugd/b8c837_68ddddd5a1754db5928c765591c206e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_882974bfd91d4483abc4bc256aa23e76.pdf
    • https://static.usrfiles.com/ugd/067ecb_3d5f11d5ad474090b6ee9f4da98c8645.pdf
    • https://static.usrfiles.com/ugd/b8c837_db36a262cf0345a29e1921386e480fe3.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c9e79d1581144c1ba5652b781978cfe.pdf
    • https://static.usrfiles.com/ugd/b8c837_916e44f6fad5480fa1539ac33117e80c.pdf
    • https://cdn.shopify.com/s/files/1/0463/3391/9387/files/66134868754.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/16435580792.pdf
    • https://cdn.shopify.com/s/files/1/0430/8221/9674/files/44294808994.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/assamese_janmoni_video_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005842.bin
3c28b54f1bf0c38383c32fe2273dac20b4875baa34d4475147ea97bd68d3a05a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5842 5028 bytes
font_01_sfnt_off00006981.bin
8c55a2a15f4caf497371ee1ec43bf3a793dc54b8262d88a7c456f737406659dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6981 10668 bytes
font_02_sfnt_off00008dfa.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFA 4324 bytes