Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e80ef8f251b1ad…

MALICIOUS

PDF

45.2 KB Created: 2020-08-29 18:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0fd31fb1d6bb7cfcbe2736ed133b136 SHA-1: 1474c0ffd8e23f68a3de0a78b71c29035fb0f4eb SHA-256: 95e80ef8f251b1ad8119685ba305d0f1f3fa5ab7b478df77372392761180d833
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The PDF also exhibits characteristics of a link farm, embedding numerous links to external PDFs, likely for SEO manipulation to increase visibility. The ML classifier strongly indicates maliciousness.

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.cc/wix?keyword=evaluating+algebraic+expressions+free+worksheets
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/jopebepe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6920/1832/files/wubezivigi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4353/4486/files/24482787479.pdf
    • https://cdn.shopify.com/s/files/1/0462/2745/6151/files/sewat.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/onenote_android_tablet_sticky_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/cantilever_structure_design.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/99046512668.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/tuwovujirosogedab.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6757/files/65754083284.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/xilokomujirunikebabiru.pdf
    • https://static.usrfiles.com/ugd/8de238_9a7eeaf5922b46bc86a4e7b4f7863052.pdf
    • https://static.usrfiles.com/ugd/b8c837_57218dcf9dc4439c993db971d6dc7c39.pdf
    • https://static.usrfiles.com/ugd/b8c837_45d168df0d544de6a846328f3b998d86.pdf
    • https://static.usrfiles.com/ugd/b8c837_576b572585034db998e9fea34c285dc0.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/
    • https://cdn.shopify.com/s/files/1/0437/2499/6757/files/65754083284.pd

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c0.bin
a4a146f4a0bd057db87dc844fe05796711364c24ebdc2a94ab9bc62b3e7cc839		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C0 5540 bytes
font_01_sfnt_off000076a4.bin
487798406d75f894e5ec482710652a25e1fec04592108cb2a82d16e167a53184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A4 10120 bytes
font_02_sfnt_off0000993f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x993F 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.