Malicious PDF — malware analysis report

Static analysis result for SHA-256 559f5d8f1188a113…

MALICIOUS

PDF

52.0 KB Created: 2020-08-06 04:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81ee582778765e16cc9dbb66893b1318 SHA-1: 6a1be0315a215e6fa5d08222a32b5588fd830d57 SHA-256: 559f5d8f1188a113926bacde557e4fcf97e312450a49e6d10bff37cec9da93ff
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting the PDF's primary purpose is to redirect users to malicious infrastructure. The heuristic firings confirm the presence of a malicious redirector and a link farm.

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.cc/pify?keyword=segmentation+targeting+and+positioning+definition+pdf
    • http://files.merizzi-psychotherapy.com/uploads/1/3/1/3/131378776/lixula.pdf
    • http://files.elopechattanooga.com/uploads/1/3/2/8/132815015/1945e756d4.pdf
    • http://files.soroptimistlondon-on.org/uploads/1/3/0/8/130874567/xumom.pdf
    • http://files.tiantanstemcell.com/uploads/1/3/1/4/131438018/pisonil_vijelote_tisat.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/dejekerifotuwome.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/verbal_ability_for_cat.pdf
    • https://cdn.shopify.com/s/files/1/0434/9489/9864/files/gefol.pdf
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/vuwutunezadaxejoninarumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2440/1063/files/81776386653.pdf
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/quote_box_discord.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/91304640309.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/2468957156.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/30518075770.pdf
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/2008_chevy_malibu_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/accounting_and_financial_analysis_in_the_hospitality_industry.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/30676319426.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_off00008d6c.bin
8f2c4dbfa5680b717e60cdf1364dd2f465878e8ae0090c08aa901663f6cc3110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6C 5432 bytes
font_01_sfnt_off00009fcb.bin
81ad62f2ce9afecde7ba326b45dc2c5a87b117291e20b671e1bc60cebe13ca2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FCB 10208 bytes

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