Malicious PDF — malware analysis report

Static analysis result for SHA-256 59cc76ccb0b965ad…

MALICIOUS

PDF

38.1 KB Created: 2020-08-14 23:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebfa64188ecbe41e9eab4dab5eed9b52 SHA-1: a8c71ba43b971ca5887084f8259cbd010a8eca7d SHA-256: 59cc76ccb0b965addcd46bdfa56150c6fc71c3b1a03fc7d715235fdde400f669
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded JavaScript and multiple external links, including a critical PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'ttraff.ru'. This suggests the document is designed to redirect users to malicious infrastructure. The presence of numerous PDF links, as noted by PDF_SEO_LINK_FARM, further supports a malicious intent to distribute harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=acr+form+for+contract+employees+education+department
    • http://files.t-wallsofjointbasebalad.com/uploads/1/3/1/3/131380063/buvib.pdf
    • http://files.cenmichigan.com/uploads/1/3/0/8/130873983/d85f4db6675c.pdf
    • http://texekil.lagunaelite.com/uploads/1/3/1/4/131452903/a76bc13c64.pdf
    • https://cdn.shopify.com/s/files/1/0439/2851/8824/files/83062731345.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0734/files/84267770727.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0058/files/pawabofepawotatesugojaxug.pdf
    • https://cdn.shopify.com/s/files/1/0439/4693/4430/files/somutezugibukulepolatoxoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/chat_commands_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdf
    • https://cdn.shopify.com/s/files/1/0451/5204/3162/files/bhagavad_gita_as_it_is_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/68916309873.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/26285660565.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/35900838225.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/ruxilejewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/78245452930.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/sedentary_lifestyle_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/rixebobipoziforibu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056a2.bin
40393dbcc19a903f4b4687b47401f612745384477d050f79cb8c2dae769a03a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A2 5392 bytes
font_01_sfnt_off000068e1.bin
ea0a16f37b8c3280b01b1681b35e9f78e53462629c0cc860b09db5b85e91980d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E1 10052 bytes

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