Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3f0f2812b7cc72…

MALICIOUS

PDF

51.1 KB Created: 2020-08-10 14:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42749f93f567ab1e5c1c1f89bbeede1d SHA-1: ba16e0169b4c0db3707659dbd02188d1a7396ad2 SHA-256: 5f3f0f2812b7cc72c545da1c75f5e30a5f1ace94452b53d58398c44ed686e73b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that mirrors this malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware delivery.

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=abyssinian+crisis+pdf
    • http://files.leesburgheritagesociety.org/uploads/1/3/2/6/132682787/togax.pdf
    • http://files.littlecreekneedleworks.com/uploads/1/3/0/9/130969710/9585647.pdf
    • http://files.increaseministries.com/uploads/1/3/0/7/130776485/3556119.pdf
    • http://files.cahootsads.com/uploads/1/3/1/0/131070689/nafanipamow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/amhran_na_bhfiann_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0446/8034/7801/files/acrobat_reader_writer_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/item_generator_tf2.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/33458518135.pdf
    • https://cdn.shopify.com/s/files/1/0437/8142/3262/files/german_grammar_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/dark_souls_2_cheat_engine.pdf
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/jekiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5235/files/72460905877.pdf
    • https://cdn.shopify.com/s/files/1/0434/0544/3237/files/rational_numbers_as_decimals_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/94923595402.pdf
    • https://cdn.shopify.com/s/files/1/0439/2707/7032/files/81792278975.pdf
    • https://cdn.shopify.com/s/files/1/0435/3330/3976/files/zexedo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/59188455844.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a2b.bin
335196643b17dd2fc22ae853e481318292b60c40f3cd92e3e56d0f7d4a19e605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2B 5348 bytes
font_01_sfnt_off00009c56.bin
ee877bbea7aa82bfdab4684a0548c9f68e349ed3a1a89b45a65d85c8b217c742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C56 10192 bytes

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