Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b30373f4a8bd1a8…

MALICIOUS

PDF

50.7 KB Created: 2020-08-10 14:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4315a4ce876cd2e5c00f24f4bc412747 SHA-1: af8e6fbaa8cc26cb7a8b2339a03b67765f8aaead SHA-256: 5b30373f4a8bd1a8a2e6969ac514c544c09df05f11e198afaf3f54026b284f99
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=types+of+genetic+mutation+pdf, which is also flagged by heuristics as a malicious redirector. The presence of many Shopify-hosted PDF links indicates an attempt to disguise malicious activity within a seemingly legitimate context.

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=types+of+genetic+mutation+pdf
    • http://difiv.heritagepumps.com/uploads/1/3/0/7/130775403/jekake.pdf
    • http://files.adorote.org/uploads/1/3/1/8/131871704/7040157.pdf
    • http://files.woodenitbenice4u.com/uploads/1/3/1/4/131483083/5604715.pdf
    • http://files.armarnib.com/uploads/1/3/0/9/130969220/6413204.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/zuvokijag.pdf
    • https://cdn.shopify.com/s/files/1/0432/2200/7965/files/acupressure_points_for_back_pain.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/vaimanika_shastra_book_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8637/files/65565064132.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/49251792612.pdf
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/68774328805.pdf
    • https://cdn.shopify.com/s/files/1/0437/3214/0186/files/chava_marathi_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/english_for_life_beginner_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/96258737819.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/vozasugamirelu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/california_bar_registration.pdf
    • https://cdn.shopify.com/s/files/1/0448/4051/7792/files/tropic_of_capricorn_henry_miller.pdf
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/9438859350.pdf
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/59782254640.pdf
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/jonirugo.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_off00008801.bin
88ff86d90d1579d1bae4b237b6b8b73f9c4c58ae53127ad9506ff3e1b2644661		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8801 5396 bytes
font_01_sfnt_off00009a5f.bin
f4d3006823ce6148f8b1b96d5bf76d147057fda64f91585b61fac552a3a8fd17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5F 10256 bytes

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