Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc79e490dc688bbe…

MALICIOUS

PDF

47.4 KB Created: 2020-08-06 11:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b829379ee1da9e28657eb914880a311 SHA-1: 5c3075b4f622c287f7cf98c81e72e687de41c701 SHA-256: fc79e490dc688bbe2655964cd0be100d1f2518665a066d21ac0de3b8c20925b2
120 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 likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL and references to 'pw atkins physical chemistry pdf', suggesting a lure to download further malicious content. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO poisoning to increase visibility of the 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/pify?keyword=pw+atkins+physical+chemistry+pdf
    • http://files.techlitecorp.com/uploads/1/3/2/3/132302824/tukojuvojudiw-faxovotaliselim-japapawogamijal.pdf
    • http://fizuzepiz.partainsenglishclass.com/uploads/1/3/0/7/130775732/4686999.pdf
    • http://files.laniakeamedia.com/uploads/1/3/1/3/131380504/genakip.pdf
    • http://files.heartfelthealingcounseling.com/uploads/1/3/0/8/130873822/xezibojes-fates.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19085525902.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/55247282922.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/tapevigexo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/55997473846.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/bafarisexitisemowufib.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/42434911710.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/54632820842.pdf
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/mitifowapof.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1468/files/b_ed_entrance_exam_2020_up_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/luzejepazibafaropomunu.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_off00005fd0.bin
9879c16328f16b5596386bb64e68aa0a4f5037558d42397ddb27a0e79ca8b2f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD0 5652 bytes
font_01_sfnt_off000072fc.bin
3f571bda67557f73d88d2d3fd64e176555806d6346db63b19a023658ff273b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FC 10024 bytes
font_02_sfnt_off00009566.bin
919bf99a8f6fa2c3ac70872e095e892753c9a9f5fb7faa34ff562d9d378bca4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9566 17900 bytes

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