Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f9111b0d715784…

MALICIOUS

PDF

34.2 KB Created: 2020-08-30 08:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34efb73c9495fadd1edc7c6f65acbb57 SHA-1: 352e1ce6f2acaa12d3044b17c294db7f6166477a SHA-256: f5f9111b0d7157848b54cd5e10720e6b35351ed7f73410152302b5a3625ab5f3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm, containing numerous embedded links to external resources. One primary URL, https://ttraff.com/wix?keyword=mcm+menu+skyrim+special+edition, is flagged as a known malicious redirector. The document's structure and the presence of many benign-looking PDF links suggest an attempt to obscure malicious intent by distributing traffic across multiple domains. No scripts were extracted from this sample.

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.com/wix?keyword=mcm+menu+skyrim+special+edition
    • https://static.usrfiles.com/ugd/c1de29_9e6c5b1158bc4c8e839e292ec2318a45.pdf
    • https://static.usrfiles.com/ugd/912de2_330432447a4146d8bf13ca1ce5ace0f1.pdf
    • https://static.usrfiles.com/ugd/1c90dc_c0fb0f62e2744f328a6511778408d338.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_01f2364bf5d144c09ba6cd23be95dc9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8de0b5250514b5fb7de2c281ec5ba82.pdf
    • https://static.usrfiles.com/ugd/b8c837_c932625d6e78453ca8ecbc84a2ade8ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd9bfd38d42e48b6bb8d100e0355912b.pdf
    • https://static.usrfiles.com/ugd/97aff7_08b4713eb0c94a77b5472232dc0dda90.pdf
    • https://static.usrfiles.com/ugd/b8c837_bde90f7483ef46718d6fc682b1c3613f.pdf
    • https://static.usrfiles.com/ugd/538d67_a5d5dfcafe6d42f683af47930f991ee4.pdf
    • https://static.usrfiles.com/ugd/dad90e_850fb4469a8f44daa79d592cab0df33d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f66acebd9c5a44d2b41c188da780c883.pdf
    • https://static.usrfiles.com/ugd/0049ca_20c7b8efa0bb4fc9b1ebc0687bb4bad1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004844.bin
ae837c397f51d998d6694c4c9aa5ea3c4d2f7056b4646c04fa9930fb8b915372
pdf-font-stream PDF embedded font (sfnt) at offset 0x4844 5392 bytes
font_01_sfnt_off00005a8b.bin
0f17c7455756112824635c0466532021c37f5c7816d822a4ffa9a843aeb759d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8B 9952 bytes