Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d27965a4a7b9013…

MALICIOUS

PDF

47.6 KB Created: 2020-08-22 13:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 133fbe4e637af533c79216753e924bf4 SHA-1: a78db8a58143642002509ba045b44db91e6e973c SHA-256: 8d27965a4a7b9013c859b3a16add75907790a8f29fb8f2866c59839ad12a8af9
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'exam test answers persona 5'. The primary malicious link identified is 'https://ttraff.cc/pify?keyword=exam+test+answers+persona+5', which is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=exam+test+answers+persona+5
    • http://fodexa.perchancetheatre.com/uploads/1/3/1/3/131384600/a803713e2fb1d8.pdf
    • http://pabatekip.thesarcasticonions.com/uploads/1/3/1/3/131383544/donemevubofiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/jozozixopezixefomuzetowo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4752/5269/files/ardaas_karaan_movie_by_filmywap._com.pdf
    • https://cdn.shopify.com/s/files/1/0433/3201/0152/files/bambuterapia_corporal.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/video_game_platform_definition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/21226697209.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/75883225807.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/4886/7739/files/tamoganobig.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_off00007e43.bin
1d6d81fd29b699c0803c805582e6b5caf1120cd4ed69c45f1ffd55b41e599a7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E43 5176 bytes
font_01_sfnt_off00008fe0.bin
36ac1725107516f405df87fc3bd8036ad707a372a33248a6432296b896279378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE0 10024 bytes

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