Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb259afbd3a3c71…

MALICIOUS

PDF

56.1 KB Created: 2020-08-23 18:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26db1516c62eaa2de355d4af8bfb6a9a SHA-1: b9f95525e91abd02527d78eb7164f1ccd8ce9b2e SHA-256: fdb259afbd3a3c71d8e07b4c212a2ab0f614c6ab4350a1aaeed655b6415ad0a5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with text related to 'Bhoot fm 2011 all episodes'. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=bhoot+fm+2011+all+episodes
    • http://files.chrismurraywheelworks.com/uploads/1/3/1/8/131871484/56e6a4af56055.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/agenda_2019_maroc.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2053/files/robamulubugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/34796348851.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/61321584230.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/nezakatuvokuzufiminuzuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/temavoretixaruj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/tubuwupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/sonepuj.pdf
    • https://cdn.shopify.com/s/files/1/0450/8083/8309/files/alagappan_clinical_medicine_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0449/5143/7480/files/strength_training_without_weights.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ee6.bin
099571977cdeabaac3b667f9dc051cb414d29a7fcdcd4c65058eeaaea80d2aab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE6 5244 bytes
font_01_sfnt_off000070b8.bin
90c0e279ffb4ff2bf0f6c54eb880188b7055fcce8339f0837f2217e0b8d1df69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B8 8288 bytes
font_02_sfnt_off00008b65.bin
67fcce263ac9b03987fd52c702f3d71f6e01f797ac4665a6efe55cce71a0076d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B65 10608 bytes
font_03_sfnt_off0000afec.bin
2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFEC 16144 bytes
font_04_sfnt_off0000c4eb.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EB 4324 bytes

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