Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce90cb982be30f0…

MALICIOUS

PDF

45.2 KB Created: 2020-08-01 20:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2db415a4a83b17a3b999dc43140d5781 SHA-1: 4ddf69083d5b086238f8e43c0fe73559460714f9 SHA-256: fce90cb982be30f0dab664be2a4335cc67cce6e2d4d943b89d5b15b1b0693e4c
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This redirector is associated with the search term 'unity 2d collision', suggesting a lure to attract users interested in game development. The ML classifier also strongly flagged this PDF as malicious. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious site.

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.ru/pify?keyword=unity+2d+collision
    • http://files.courtneystinson.com/uploads/1/3/1/4/131452803/3287996.pdf
    • http://files.dkg-gammachi.org/uploads/1/3/0/9/130969385/wozijurojolixufube.pdf
    • http://files.ginandtarnish.com/uploads/1/3/2/6/132696285/286c5e.pdf
    • https://cdn.shopify.com/s/files/1/0433/2430/9659/files/xidodexemuxujovipasezeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/60020962856.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66048758492.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/27466953877.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/66286110519.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35679391278.pdf
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/66301894479.pdf
    • https://cdn.shopify.com/s/files/1/0431/7662/4279/files/6982489109.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/vekisikokozo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/volexesoxosiweloledixepip.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/54596436368.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f1a.bin
08d2645cff57bf563d177f82cc85ddebfbe9a106988de91ff6bc19eff5e92c52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1A 4852 bytes
font_01_sfnt_off00006fc6.bin
aefb91659fffb03004d91c492fd8a61e069e3053f36f52cff86d2036fd436d55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC6 10028 bytes
font_02_sfnt_off0000924f.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x924F 16312 bytes

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