Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b2da4f89515d61…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 07:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00c591f886f6ca7311c2731ae98248ce SHA-1: 05f3193c3405ee50b25adeac0da3c5d78c5e125f SHA-256: 02b2da4f89515d6128fe461c3f586c32f5779a3b4f582d577bbe985a46309ed2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=anthem+for+doomed+youth+analysis+pdf', suggesting the intent is to redirect the user to potentially harmful content. No scripts were extracted, but the presence of numerous links indicates a link farm or phishing attempt.

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=anthem+for+doomed+youth+analysis+pdf
    • http://files.outoftheboxphotography.net/uploads/1/3/1/4/131438468/1338414.pdf
    • http://files.bethinkcreate.com/uploads/1/3/2/7/132740218/70bd1ff781.pdf
    • http://files.garrafraunsns.com/uploads/1/3/1/8/131871677/61d99e616122b5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nidosavexurirevinuno.pdf
    • https://cdn.shopify.com/s/files/1/0447/1973/4938/files/music_an_appreciation_8th_brief_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7787/files/discord_public_servers.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/fepewafosemuvixuvufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/nuleneligo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bizisumexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/novul.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/16121753025.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/95809213246.pdf
    • https://cdn.shopify.com/s/files/1/0450/9263/4789/files/anosmia_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/14000149915.pdf
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/xaxawononokalu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006777.bin
2fdb557dd4976a5f052e373b1bd5d79973712243e934e64f9c2d4a240b382500		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6777 5252 bytes
font_01_sfnt_off00007925.bin
f752768914e82aab68e89a1fddbcff2e19c631b7bceaf154e15bec3d554d1c7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7925 9852 bytes
font_02_sfnt_off00009ac9.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC9 4324 bytes

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