Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a79abb86736b44b…

MALICIOUS

PDF

41.4 KB Created: 2020-08-26 02:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 698dc07c5b9e81113b92e52a330067e6 SHA-1: 2b684ba6864e9b92de86d06dffc95fb17f88941a SHA-256: 1a79abb86736b44bcbf116ab108bd4c169ef0c0c56101730a44ddacc49eb6858
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=danielle+colby+nude+pictures`. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify and other domains, suggesting a link farm or redirection scheme. The primary attack pattern involves luring the user to click the malicious link under the guise of adult content.

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.com/pify?keyword=danielle+colby+nude+pictures
    • http://files.bunkabiker.org/uploads/1/3/1/6/131637316/0cd941ab0ef2f.pdf
    • http://mekonig.jonathansclassroom.com/uploads/1/3/0/8/130814328/bujezubobatidokit.pdf
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/files/ranavukakiniwigevamame.pdf
    • https://cdn.shopify.com/s/files/1/0435/0358/3384/files/tutodadugidodedevigar.pdf
    • https://cdn.shopify.com/s/files/1/0438/9958/4680/files/86990638145.pdf
    • https://cdn.shopify.com/s/files/1/0432/9934/0448/files/16163096461.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/catering_management_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/lijapidivew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3760/files/baidu_browser_for_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8775/files/tuxedarenebojud.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4677/files/278339728.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/50375053130.pdf
    • https://cdn.shopify.com/s/files/1/0439/8209/4494/files/noxomunekevewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8916/5478/files/5224777242.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/52920182944.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_off000062f7.bin
23718bb2e24599d97687f06b7a4fdaef79e1b2b6684226e3bd96f45b700108fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 5308 bytes
font_01_sfnt_off00007509.bin
b19210e605b23a20b047f9f75031f4a4590865bd22518c22578d5633c99cb570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7509 10516 bytes

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