Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a33d1a4aef1d92…

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 10:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 823a2dcecce0e85858eb68ec75f4a6ed SHA-1: 20eb710fc580b7e4cead35454a0328b1cd4cb032 SHA-256: 80a33d1a4aef1d92a99cf0d3550fdcb7c90aeba21eb68738765bb11f589fdff9
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including one pointing to a known malicious redirector. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=antivirus+avira+gratis+2018', suggesting a lure to trick users into clicking on a link disguised as a search result for antivirus software. The presence of numerous Shopify-hosted PDF links further indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination.

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=antivirus+avira+gratis+2018
    • http://files.coderedpicturecompany.com/uploads/1/3/1/3/131379743/6229699.pdf
    • http://files.omganeshayoga.com/uploads/1/3/0/9/130969446/44f17b5ad8.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/tcs_verbal_ability_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/lapakasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4731/3827/files/pozunebugamuxolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/gk_current_affairs_2020_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/90124839614.pdf
    • https://cdn.shopify.com/s/files/1/0459/3290/4615/files/trusteer_rapport_safe_uninstall_utility.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/5294226618.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/62824111311.pdf
    • https://cdn.shopify.com/s/files/1/0431/5335/8999/files/building_skills_toefl_ibt_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5758/6071/files/69152660160.pdf
    • https://cdn.shopify.com/s/files/1/0447/6112/0919/files/chemistry_balancing_chemical_equations_worksheet.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_off00006c56.bin
cc4aea91f15f7507070f91349e7e10ea034a49ae93f79139860cd68bfd4a03ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C56 5388 bytes
font_01_sfnt_off00007eba.bin
1887d1a0c4840641cea54036897c2aa1a137a3af8c3c59faa51d654d276e1a6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBA 13444 bytes

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