Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf32da696c79bfaa…

MALICIOUS

PDF

37.7 KB Created: 2020-08-11 00:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fb0b619fb558cde54e8f6a4fbf29d3e SHA-1: a8bdd6ad125c74c843e4e93f6d0f2069dacff749 SHA-256: cf32da696c79bfaa003a86ecb68a68ff48bb61d7e1e3b9bf89e312bf80f5d32b
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One of these links, https://ttraff.ru/pify?keyword=el+camino+del+artista+cameron+pdf, points to a known malicious redirector. The document body contains garbled text but also includes the same malicious URL, suggesting it is the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate malicious destination.

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=el+camino+del+artista+cameron+pdf
    • http://files.midwestnettingsolutions.com/uploads/1/3/0/8/130874370/68542bd9ec089.pdf
    • http://files.thereadventurer.com/uploads/1/3/1/4/131406806/9d55079f.pdf
    • http://reperukim.stedspsychology.co.uk/uploads/1/3/2/6/132696414/kufafaxuvatifu.pdf
    • http://tosuluzub.tromakenerji.com/uploads/1/3/2/7/132740978/da36b19e0029b.pdf
    • https://cdn.shopify.com/s/files/1/0431/0299/4586/files/velusonevumidinidapudulu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/zazezufosunonulajin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/ielts_vocabulary_words.pdf
    • https://cdn.shopify.com/s/files/1/0452/3006/3773/files/list_of_all_formulas_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3656/3866/files/bajirao_mastani_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/nanakshahi_calendar_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/vengeance_sample_pack.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/54453835733.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/factorio_blue_circuit_blueprint.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/banking_syllabus_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0451/0593/8584/files/business_organisation_management_notes.pdf
    • https://cdn.shopify.com/s/files/1/0447/9890/2438/files/mibimi.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_off00005368.bin
db2cfc953adea79e6c6298f86c28f9576a91ddd8bb866176153d98c2a2a26939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5368 5256 bytes
font_01_sfnt_off0000652f.bin
38951f837a3367f3125626ea81f4b63681ee5d0dc2358f3eca66205e82da851b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652F 10772 bytes

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