Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcc105930b39924…

MALICIOUS

PDF

33.5 KB Created: 2020-08-16 23:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c49922f85f2c85e57ab70eaf3990f553 SHA-1: b14f7e4da475c7da3fcc6b39e898dd4b98102259 SHA-256: 0dcc105930b3992449ff506db45bba1e7fd9dbb2a2cb0e8d015d1dc1e7758651
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a lure for remote support tools, specifically mentioning TeamViewer quicksupport. It embeds a link to a known malicious redirector, ttraff.com, which likely leads to further malicious content or downloads. The heuristic firings strongly indicate malicious intent and the use of a redirector to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=teamviewer+quicksupport+version+10
    • http://files.urintuitivecoach.com/uploads/1/3/1/4/131437736/kujazuxawopusadu.pdf
    • http://files.bethelagapeministries.com/uploads/1/3/0/7/130738765/fedojid.pdf
    • http://nawobu.chs2007.com/uploads/1/3/1/8/131856772/tefaseligofolow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5907/6502/files/42877201032.pdf
    • https://cdn.shopify.com/s/files/1/0440/0594/9590/files/medudovone.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/tratamento_da_cirrose_hepatica.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2208/files/ibps_clerk_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3151/files/bsc_computer_science_syllabus_du.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/20608276570.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/39321335262.pdf
    • https://cdn.shopify.com/s/files/1/0436/2669/2771/files/56847606979.pdf
    • https://cdn.shopify.com/s/files/1/0434/9001/7430/files/65404295762.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/nezekadutiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/parallel_sorting_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0433/9993/8211/files/simple_fruit_smoothie_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000466b.bin
ab4671b50684190a06434b6f2162d60b0dd8544d5d762f6afb278ea2b715370d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x466B 5532 bytes
font_01_sfnt_off00005949.bin
264aa42beb48f4d9b9e3b83cac21ba63396f52a1cee6868265f7d20a63de560a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5949 9424 bytes

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