Malicious PDF — malware analysis report

Static analysis result for SHA-256 32670c283b4a8890…

MALICIOUS

PDF

59.2 KB Created: 2020-08-26 11:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 125132747f7dd7134b6e17ecf12f20b0 SHA-1: 1dc7bffa192aa8ec6b66dd191dddbeb500395a82 SHA-256: 32670c283b4a889090798eb872bbb85a888c6a7328dc978184093af2f0d7e6da
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The link directs to 'ttraff.cc', a known malicious domain. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious verdict.

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=8th+edition+codex+release+dates
    • http://files.tourwithxuan.com/uploads/1/3/1/0/131070849/vozejagufititabaxata.pdf
    • http://ranapawu.snowyrangeleather.com/uploads/1/3/0/7/130776811/papotegasi.pdf
    • http://files.stpeteretown.org/uploads/1/3/0/7/130776208/zizilofebaris.pdf
    • http://files.artistcafeutica.com/uploads/1/3/0/9/130969659/74de3e6.pdf
    • http://vupiv.foxfieldrecoverymission.org/uploads/1/3/2/3/132302868/kanipuwubug.pdf
    • https://cdn.shopify.com/s/files/1/0437/0785/9096/files/jumemakeliz.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/55160595480.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/cardiotonicos_y_antiarritmicos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/wotetafesofekabofuruwazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9957/7756/files/doposiwupilosularenolix.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/46851337989.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/accursed_share_bataille.pdf
    • https://cdn.shopify.com/s/files/1/0464/9854/5822/files/extruded_hole_in_sheet_metal.pdf
    • https://cdn.shopify.com/s/files/1/0439/0574/5051/files/abc_tv_reporters_list.pdf
    • https://cdn.shopify.com/s/files/1/0436/9773/3787/files/cambiar_de_a_word_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/ffxiv_rogue_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/8569/9997/files/angel_broking_account_opening_form.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_off00009f5c.bin
a8f3bb7d694ea4a55ad63b6c63c94118665f13d87dd7cbdb93f0b6f1ce409289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5C 5196 bytes
font_01_sfnt_off0000b0ef.bin
255e7dbd35021b913ddfc58a05c58121b3fa68ed0c92e7654eb031f8d9e24556		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EF 15088 bytes

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