Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef03aca067d03e2d…

MALICIOUS

PDF

46.3 KB Created: 2020-07-27 18:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f106a174f371c73ac99cbdeb6338fee7 SHA-1: a000ee28b6548efd3cde5ba9ce829d53699e5a7f SHA-256: ef03aca067d03e2ddd594a4ea7cf3eacf96e721f5b8255c4c6f190a865a5069c
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a game guide. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'Dishonored 2 mission 4 guide', reinforcing the lure. The presence of a large number of embedded links, many pointing to Shopify, suggests a link farm designed to obscure the ultimate malicious destination.

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/pify?keyword=dishonored+2+mission+4+guide
    • http://files.andreganz.de/uploads/1/3/1/4/131438150/2857200.pdf
    • http://files.feedingmywanderlustgene.com/uploads/1/3/0/8/130874400/404348.pdf
    • http://files.pickandswap.com/uploads/1/3/0/9/130969809/6900270.pdf
    • http://files.natureimprintedphotography.com/uploads/1/3/1/4/131438427/52b4869a85f27ae.pdf
    • http://files.happymamahappybaby.us/uploads/1/3/0/7/130739116/0c268.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/banefidofekadozimodomi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4536/2591/files/61723636654.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/19286137044.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/vumaripokogelugivaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/36100012433.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/49366642719.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/rifurix.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/55891499367.pdf
    • https://cdn.shopify.com/s/files/1/0436/3767/0041/files/77012466482.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/76102165103.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/18919145939.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/najopije.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/8509302142.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_off000078fe.bin
c1bac088097fe720a723e373b2b78260c857f79d0c35aaaaee2f235d3ff729ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FE 5020 bytes
font_01_sfnt_off000089d7.bin
da79fa184236c5d651b6d83ff3b89ff277f6fd459cb84a37c63c2ad142c512f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89D7 9992 bytes

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