Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a34de83a528483d…

MALICIOUS

PDF

49.4 KB Created: 2020-08-07 07:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13244a753aba02e0d3528dcd0d72aada SHA-1: 364eb0294d37728f01323d4affaf65be2c51dcd6 SHA-256: 0a34de83a528483dceb4e5bc4353fc34cac25c087885d4e2cf0945762b30b881
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final malicious destination. The primary malicious URL identified is ttraff.ru, which is known for redirecting users to potentially harmful content. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a link farm or redirection tactic.

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=psychological+capital+theory+pdf
    • http://files.oconnorsmusic.net/uploads/1/3/0/7/130775665/590ddd.pdf
    • http://files.anchorageonthestlucie.com/uploads/1/3/1/3/131398360/jetewodefol.pdf
    • http://files.samanthaprewettphotography.co.uk/uploads/1/3/2/6/132683328/3624346.pdf
    • http://files.micheledewinton.com/uploads/1/3/2/7/132712206/1fe06c0547a8283.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/xevik.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/29267228161.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/35151879140.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/game_activity_discord.pdf
    • https://cdn.shopify.com/s/files/1/0440/9543/9000/files/guwimizaroxik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/corporate_finance_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/spatial_and_attribute_data.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/49143645851.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/jifaxileviliwu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6523/5866/files/the_security_alert_is_scrambling_the_screen.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/sawajewiwajikaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/waxejexus.pdf
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/lowe_s_advantage_card_login.pdf
    • https://cdn.shopify.com/s/files/1/0433/3230/5054/files/zovixenenibav.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_off00008317.bin
0844e6fb92c6f49f46a64f10fdd8b9cc3b143068641328069d61fa7ef697b653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8317 5520 bytes
font_01_sfnt_off000095e3.bin
aa0e1ef9830f3be9f65c1d3bb41ea380b298b4f3a1f7ebad117a1bf0e12095b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95E3 10132 bytes

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