Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29a450be9303c6c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-11 23:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4627553abb32c774c4d2cc29eedb0d9 SHA-1: 698dbf0026ff8e95676ef1b594ae14dc65247256 SHA-256: a29a450be9303c6c0b3466bfd3034a4640712e5405edf6aeeb9afd493982fbfd
150 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.ru/pify?keyword=cheddars+tucson+menu+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cheddars+tucson+menu+pdf
    • http://files.texgermanshepherd.com/uploads/1/3/1/6/131606006/6a0108d0.pdf
    • http://files.saint-tims.com/uploads/1/3/1/1/131164417/ropukalafi.pdf
    • http://files.jennifercrowderartist.com/uploads/1/3/0/7/130776728/7130326.pdf
    • http://files.sandpiperstudio-photographybychristine.com/uploads/1/3/2/6/132695372/juvopakuxe_pamexuvojep_dukixuxasesixop_vosomase.pdf
    • http://gurexarin.echoltdqc.com/uploads/1/3/2/6/132681670/b3620b2.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/sebutovuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/suzuki_king_quad_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/22979673241.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/gedilosafebejo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/mudidinumomu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/ukulele_chords_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/87283846730.pdf
    • https://cdn.shopify.com/s/files/1/0430/4797/7114/files/belajar_tajwid_untuk_pemula.pdf
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/34380295056.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047e4.bin
8195e13655426855ffe80ddfc58ab3e4c92654282ff2c40cb9c34bb81220417f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47E4 5268 bytes
font_01_sfnt_off00005996.bin
9f42e210d4ca0d21e8a2e42a0ef0ed25168a680f89bae2ec6cadf2c412046394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5996 2472 bytes
font_02_sfnt_off000064a6.bin
0b5ddd6e7f0f587c4e74e00c1b1ef0317c2390e0dbf6f2e049b1f4c7779c82a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A6 10128 bytes
font_03_sfnt_off00008792.bin
5238d7674f6341cd1fa175b2706d124ba0b52bc477eef0f7017b2d90ea865301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8792 16288 bytes

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