Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d67332017a671c5…

MALICIOUS

PDF

35.6 KB Created: 2020-09-07 17:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 364fb2685973cf01590b7f6125c1dcf8 SHA-1: 2db9c8f7119b97a8a926131c9b45da810700a33e SHA-256: 8d67332017a671c590c2387df8682100401ddb3bee42d3f90ce577e6ce7fea7d
152 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, including one identified as a malicious redirector. The document body and embedded links suggest a lure to trick users into visiting potentially harmful websites, possibly for phishing or malware distribution. The primary malicious IOC is the redirector URL: https://ttraff.link/wix?keyword=add+subtract+multiply+divide+decimals+quiz+pdf.

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.link/wix?keyword=add+subtract+multiply+divide+decimals+quiz+pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/16427040482.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/minecraft_connection_timed_out.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/66255366788.pdf
    • https://cdn.shopify.com/s/files/1/0465/3845/7238/files/gameboy_and_ds_emulator.pdf
    • https://static.usrfiles.com/ugd/035627_df3a219f34324e53b0bdd8daf935fa29.pdf
    • https://cdn.shopify.com/s/files/1/0435/0584/4390/files/niwagelarixotupojipazik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5309/files/fesupegiwufaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9772/files/las_1000_frases_mas_usadas_en_ingles.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_0b71742da78f468bafa3b664b9476b6d.pdf
    • https://static.usrfiles.com/ugd/0a84ca_0595f3555bf9491f90ae217cff17501e.pdf
    • https://static.usrfiles.com/ugd/8b97dd_24439077876a49be9fcb90b7ce359348.pdf
    • https://static.usrfiles.com/ugd/205ae4_1b932f061b0745ce8030b36a5a9ca21e.pdf
    • https://static.usrfiles.com/ugd/f96b02_4c922a1c2c3b4ec98bb9f45bf0642a9f.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_off00004b7b.bin
bb7b77a0f6e0ad54131b9c8156aff890c006d4199ea2c9a250461f3b634746d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7B 5768 bytes
font_01_sfnt_off00005f18.bin
50fb739d30c3f0d56fba2a4f1900b9d5616faaaddf8fdbb5406cfc198f5917e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F18 10104 bytes