Malicious PDF — malware analysis report

Static analysis result for SHA-256 876168ddd7c2c5ee…

MALICIOUS

PDF

45.8 KB Created: 2020-09-18 17:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae0bfae37c06278fb3342ab392e6ba2 SHA-1: 7044aa7579dd044fdf667937a5209bb588484f4c SHA-256: 876168ddd7c2c5ee921844a08bfa479e6663c41daea79299b2d73bb4af958a0a
120 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link disguised as a study guide, aiming to trick users into clicking it. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=bacb+task+list+5+study+guide' which is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to potentially malicious domains.

Heuristics 3

  • 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 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.club/wix?keyword=bacb+task+list+5+study+guide
    • http://files.internationalcancercluster.org/uploads/1/3/1/6/131607943/wewuzirasami.pdf
    • http://files.montanabirdsurveys.com/uploads/1/3/1/6/131606688/lomefaxid.pdf
    • http://files.scottrulandphotography.com/uploads/1/3/2/6/132695244/bobokakozinotel-gokesugatater-jojibufisobiwe.pdf
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • http://files.northyorkmoorstourism.com/uploads/1/3/0/7/130775677/xulaferana.pdf
    • http://belobeda.jmccormickbennett.com/uploads/1/3/0/8/130814328/nomigitigetaladi.pdf
    • https://f59b0b9d-5d38-43bf-aefd-84966829013c.filesusr.com/ugd/9f2514_207fd364fa944bbfbf815b0e3d1d8aa7.pdf?index=true
    • https://c7130e1f-596d-4fe0-9b8e-3edf0c97ebd1.filesusr.com/ugd/d162e3_be24bf0987d249aba0ff00e308366d57.pdf?index=true
    • https://a43c107c-c7b4-486e-93b1-c12fd5910aa6.filesusr.com/ugd/98e2de_87df0cf493b74fbd9e77087338be8610.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/96949182476.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/assertive_communication_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0441/4128/1432/files/cub_cadet_lt1042.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/wamulutipav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/dutejerutemivuwi.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_off000071fe.bin
ff82c56f6f34a0a1740f2704064e87e69b2348c2a2489a2ab29a5a7d19a85487		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FE 5492 bytes
font_01_sfnt_off000084ce.bin
1df277c24b47ee169de0f60c3e4d7ffc9856c925928ec370fa9a4e02dfe16b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CE 11036 bytes

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