Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8dd03e63c1dae2…

MALICIOUS

PDF

44.0 KB Created: 2020-08-11 03:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb053ff9194693e9d19ed9e44a3e6448 SHA-1: f4a8cdad6c48781863ddff5160e9cc03c2cb7b10 SHA-256: 7a8dd03e63c1dae21099cd9b7714f20ab746f08e0494ca334a5d89f04af2ef61
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the string 'Michael bazzell pdf' and a URL that appears to be the same malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure.

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=michael+bazzell+pdf
    • http://sugebuza.perfect-peace.com/uploads/1/3/2/6/132680813/guxuxe.pdf
    • http://files.robleggeconsulting.co.uk/uploads/1/3/0/7/130739916/jojupowikaku_vanakexodo_wamigog_zeludonovi.pdf
    • http://terutebe.executiveshuttlebuslimo.com/uploads/1/3/0/8/130873995/budefeluz-bobumefesak-benuxabulijeval.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/raxojekugamirorofopowome.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/mathematics_probability_and_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/14701207392.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9015/files/brayton_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/60121841496.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/litelogawow.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/80364897829.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0171/files/affichage_obligatoire_code_du_travail.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/delixeva.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/bohemian_rhapsody_easy_piano_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/23025931135.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/jiwetabapiranivapuvel.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_off00006f30.bin
7f0bbcc2ea1a0c6b9f8155684a129df7c604a5954a4a879d5e15c9b21cb7beaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F30 5164 bytes
font_01_sfnt_off000080c0.bin
55aeecfbe8825d9d7dd6a9305b6d06f5120697c618c7eb02d815115b0b6d42e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C0 9924 bytes

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