Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bf2f47f37de54f…

MALICIOUS

PDF

44.9 KB Created: 2020-08-24 01:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 231a7ff00e8aac8070205f221909dcfc SHA-1: c65246f8d26c081e7063ec304f7e869190fdc757 SHA-256: 93bf2f47f37de54f6716ceb8dde147d2628b376481de88f320d2806422c0bf5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and other links that appear to be part of a link farm designed to improve search engine ranking for malicious content. The primary intent appears to be redirecting the user to a malicious site, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload execution.

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.com/pify?keyword=curriculum+guide+in+math+pdf
    • http://buwinomu.darrenlingard.co.uk/uploads/1/3/1/4/131452938/rejulo-rizukixovubarut-jeveja.pdf
    • http://mebava.southernregionffa.com/uploads/1/3/2/7/132740249/07036b8690731a.pdf
    • http://files.positiveperspectivesonaging.com/uploads/1/3/0/7/130739312/667077819541.pdf
    • https://cdn.shopify.com/s/files/1/0461/4003/1129/files/67125165179.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/12997992286.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/66299306651.pdf
    • https://cdn.shopify.com/s/files/1/0436/5333/3145/files/reverse_micelles.pdf
    • https://cdn.shopify.com/s/files/1/0429/2562/1404/files/battle_run_coins_and_diamonds_generator.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/kodak_alaris_s2050_scanner.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/modular_encounters_spawner.pdf
    • https://cdn.shopify.com/s/files/1/0436/8593/7307/files/camel_audio_alchemy_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/27607831088.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006466.bin
cb166560a38adaa75fccc9d08be1234315854fc4e1a580d29ff66d8aeaaecbf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6466 5188 bytes
font_01_sfnt_off000075d6.bin
dc6de77cddc903e6abcff162dea4b822bb044db1e15f9546ab044224ff95e2ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D6 10272 bytes
font_02_sfnt_off000098f0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x98F0 4324 bytes