Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca125fb0a8617ae0…

MALICIOUS

PDF

62.7 KB Created: 2020-08-19 03:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56a91bbede282a2539a7b3fbe9ff2e54 SHA-1: 42f09ef1ecd9148d42d2f9165f514ec89a366698 SHA-256: ca125fb0a8617ae06aae842414f9c7279024a99925267f2d0a4f10b648020c39
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including Shopify. One prominent link, 'https://ttraff.ru/pify?keyword=volitional+form+of+hairu', is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to direct users to 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=volitional+form+of+hairu
    • http://kugosuja.peppermintstickck.com/uploads/1/3/1/3/131380177/tixizujevug.pdf
    • http://files.gfibriansah.com/uploads/1/3/1/4/131453133/xudiwi-zagaxilepa-bopojopiteguk-nupajefedukus.pdf
    • http://files.artandremedies.com/uploads/1/3/2/6/132695782/7505381.pdf
    • http://files.iteachmanor.org/uploads/1/3/1/6/131606262/573805.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/mefane.pdf
    • https://cdn.shopify.com/s/files/1/0435/8995/9839/files/sanujafanurar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lofolevunukexus.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/64594553471.pdf
    • https://cdn.shopify.com/s/files/1/0447/8559/8615/files/corpus_linguistics_an_introduction_tony_mcenery.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/iron_man_mark_46_helmet_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/6598/3655/files/xolapiwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/deux_arabesques_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/84056651801.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/critical_angle_and_total_internal_reflection.pdf
    • https://cdn.shopify.com/s/files/1/0446/5927/7987/files/animal_farm_reading_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6082/files/zimizilivawu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eea.bin
b5d2d8e55762a2f4be32c04d77b3d7af7a287bc115867fa456af0e2794df7ccb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEA 5932 bytes
font_01_sfnt_off00008366.bin
be970e898b05280c72930a04c114dad81b42931b35eda4568f265eb2c74bb360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8366 4796 bytes
font_02_sfnt_off0000937c.bin
489dd457f9e2492f2d13b7b82cda5d232ad6c7a246ed51c37a41b01d608456a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x937C 6136 bytes
font_03_sfnt_off0000a35f.bin
372cb557288c45ac0dfcc98998f34a1bba7ef7f04d526aaf7f29ac8af06785ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA35F 15728 bytes
font_04_sfnt_off0000d47d.bin
ec513659f0584df6300e3f5909a366ed27cdf2469b467477a08bebd9d7b1b0dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD47D 16372 bytes

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