Malicious PDF — malware analysis report

Static analysis result for SHA-256 314dd45a7f874ff2…

MALICIOUS

PDF

96.7 KB Created: 2020-08-08 21:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b383b4ef76f9529acc55bfedf430fcb SHA-1: 586f92dc31812942d0d31f06002a23e56a50edb4 SHA-256: 314dd45a7f874ff22a4687ae5e76923ab43ecdc436f8471a8b1e7f5d8b0d81b7
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, specifically pointing to 'https://ttraff.cc/pify?keyword=khorne+daemonkin+pdf'. This URL is embedded within the document's body, suggesting an attempt to redirect the user to malicious infrastructure. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=khorne+daemonkin+pdf
    • http://files.epona-equine-reiki-centre.co.uk/uploads/1/3/2/7/132740204/supugivefa.pdf
    • http://pamuguk.marymariamadonna.com/uploads/1/3/1/4/131406717/5276ff6d41b3.pdf
    • http://files.theminimaldoseskincare.com/uploads/1/3/1/8/131856224/wivape.pdf
    • http://feroki.calrhoavc.com/uploads/1/3/1/3/131398140/8503423.pdf
    • http://files.nijidesserts.com/uploads/1/3/1/4/131437246/denajevakixav.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/12222909625.pdf
    • https://cdn.shopify.com/s/files/1/0431/9333/5970/files/biblia_de_jerusalen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/wabidasuresabumopumowalu.pdf
    • https://cdn.shopify.com/s/files/1/0451/8104/2839/files/transatlantic_slave_trade_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/7152583722.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/37191124278.pdf
    • https://cdn.shopify.com/s/files/1/0429/6661/4175/files/new_opportunities_education_for_life_elementary_student_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/terafixelumowew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/94871455720.pdf
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/solving_multi_step_equations_with_fractions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/2130/9851/files/trasplante_alogenico.pdf
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/rodesumojelonive.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_off00014198.bin
fa9140aecdd8031a3a26b7c23d78fcfe2ddde867615a5ffb0297fdf0b80ed80f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14198 5104 bytes
font_01_sfnt_off000152ca.bin
a4d841f3a38a24030be5b72d561b99f7c779febc803f6081ecaeb8617502f813		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152CA 10192 bytes

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