Malicious PDF — malware analysis report

Static analysis result for SHA-256 f911a0830d4ab963…

MALICIOUS

PDF

47.9 KB Created: 2020-08-31 22:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 344f581cb8f4522da8b1e13e0a23e534 SHA-1: cdce6c61ec85e51d12a0004f3a213e52c705f226 SHA-256: f911a0830d4ab963a04715d7e1117a6ba444196c5a38a920c56d53fcf2b6b37d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=tds+technical+data+sheet+example'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links to Shopify domains, suggesting a link farm or distribution mechanism. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=tds+technical+data+sheet+example
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/78303567492.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/sojajafasumerenifoxit.pdf
    • https://cdn.shopify.com/s/files/1/0435/2580/0087/files/coesia_annual_report_2015.pdf
    • https://cdn.shopify.com/s/files/1/0461/7489/6291/files/1332155235.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/perfect_world_international_classes.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6340/files/jemafavutaxise.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/xanedumiwonifulawuzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/36867196358.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/kafelijubugutiwijaxe.pdf
    • https://cdn.shopify.com/s/files/1/0449/8348/4574/files/lilavumuwazi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4682/files/27618122771.pdf
    • https://cdn.shopify.com/s/files/1/0434/8172/7129/files/luwifarilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/tilumeratoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/gudidebamulik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a7.bin
5ee008ee3a0a401eaf4fc27900cc1634e51c6c53c1d450d731f6464554c57ff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A7 4912 bytes
font_01_sfnt_off00007929.bin
1c971c0ee0fb1425de44fa3d029451d3ad4f1d2b955f41325157c182f40ef693
pdf-font-stream PDF embedded font (sfnt) at offset 0x7929 13664 bytes
font_02_sfnt_off0000a4e8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E8 4324 bytes