Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd05d0fff2df76f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-20 04:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fd56b995f7c4ccde87cc5d061b35385 SHA-1: 01b8ee615214c414839010e86da90e194e8470a4 SHA-256: 8dd05d0fff2df76fb3fec653832b3594703ba3d4d027f677ecbc311b4320d87d
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a fake error message intended to lure the user into clicking the malicious link. The primary malicious URL identified is ttraff.ru, which is used to redirect to other potentially harmful 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=cannot+execute+binary+file+exec+format+error
    • http://fuzaruked.moorishculturalbizarre.com/uploads/1/3/2/3/132303195/b7f184c6e5a.pdf
    • http://files.theaspieneuroscientist.com/uploads/1/3/1/8/131871919/kowudibunodu-zamoxodame-lifaradoxofen-niboxow.pdf
    • http://files.cvillepack77.org/uploads/1/3/1/0/131070572/9694475.pdf
    • http://dupipanem.smallwonderjewellery.com/uploads/1/3/0/7/130739275/e104ca1b2af2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4804/files/content_manager_job_description_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/67978366691.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/86653958352.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/niledu.pdf
    • https://cdn.shopify.com/s/files/1/0441/2460/2520/files/2020354527.pdf
    • https://cdn.shopify.com/s/files/1/0432/5054/8899/files/fire_magazine_file_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0446/8441/1033/files/international_phonetic_alphabet_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/14188251134.pdf
    • https://cdn.shopify.com/s/files/1/0437/4613/2119/files/mixed_addition_and_subtraction_math_facts_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/sum_and_product_of_roots_of_cubic_equation.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/73090469973.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_off000063c7.bin
0d550d877fc6545b4c89f38595902493dde52505414ce03d2279a18f2e772a5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C7 5064 bytes
font_01_sfnt_off000074ff.bin
71e79509dbdc2b30b36fcc318c6163422c4a0314ff0b678be9665f8f7af57656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 10432 bytes

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