Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cfc809c7d9a021…

MALICIOUS

PDF

68.4 KB Created: 2020-08-14 23:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54e5756aaa9c22208fab80f83b46c94b SHA-1: d849d58d92b9a98688eac31d05b2c8c6df88820c SHA-256: d3cfc809c7d9a021692a9ca3d87ec3c0fa2f7d544b06bf8de8d1f5781d9dbb58
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users into clicking through to further malicious content. The document body also contains this URL, suggesting it is the primary lure. The presence of numerous other links to Shopify-hosted PDFs, while some are benign, indicates a link farm strategy to improve SEO and potentially distribute malicious 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.ru/wb?keyword=verbal%20reasoning%20true%20false%20cannot%20say%20pdf
    • http://files.womenspeakup.org/uploads/1/3/0/7/130775109/zodowopixikem.pdf
    • http://files.reformationocconference.com/uploads/1/3/1/6/131637529/kewifexakasawizufu.pdf
    • http://nudawuli.dodici-azpadu.com/uploads/1/3/0/7/130776228/9540638.pdf
    • http://files.pics4ulimited.com/uploads/1/3/1/4/131436978/komowo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/lamijetesesuvinevoniv.pdf
    • https://cdn.shopify.com/s/files/1/0447/3297/3205/files/10113677759.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/sublime_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/carboxylic_acid_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0433/2394/9224/files/adelaide_metro_train_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/bitencourt_direito_penal_parte_especial.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/popusamojojakal.pdf
    • https://cdn.shopify.com/s/files/1/0433/8506/1541/files/tosubiluzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/87956606485.pdf
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/css_grid_template_responsive.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_off0000ceb0.bin
0c3e1eab58a0720efa9cd2b3cac489ad39db0752d11ed63e5bfa0ee13c5595f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB0 5528 bytes
font_01_sfnt_off0000e18e.bin
1cd46b04feaa3fbea582ac96053fece8e8e71d5d02b43d243acfb7441ad649f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 10304 bytes

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