Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ded0a080afa9722…

MALICIOUS

PDF

39.2 KB Created: 2020-08-17 14:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db23023688323dc81dedd779bc2ce942 SHA-1: cad3a21309fe49bd169c809e43e525d6863a67f0 SHA-256: 3ded0a080afa972226217fe3c17957c7cddc5bfe8939df747bfacfc51fbdd677
152 Risk Score

Malware Insights

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

The PDF document contains a deceptive title related to workplace accident reporting, intended to trick users into clicking a link. This link, 'https://ttraff.com/pify?keyword=reporting+an+accident+at+work+procedures', is identified as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=reporting+an+accident+at+work+procedures
    • http://files.communication-works.ca/uploads/1/3/0/7/130776245/pemeluna-rulokofawaz-gejuka.pdf
    • https://cdn.shopify.com/s/files/1/0434/6694/8773/files/vamovivuzadosidagez.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/proxy_vote_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/89190795737.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/27106961505.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0435/files/zivafapixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/78958179723.pdf
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/migowegabumeradoja.pdf
    • https://cdn.shopify.com/s/files/1/0427/9900/5863/files/89569456621.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68876684382.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_off00005ae1.bin
fcc6c47e08504c3b2d4dee9f4db4a782be787f55a7c7cbe0ada45a0e2dd0bfa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE1 5372 bytes
font_01_sfnt_off00006d4f.bin
f37a831c5732064348f874c0389efe3727092f2747f419b2345331a7aeb65024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4F 10184 bytes

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