Malicious PDF — malware analysis report

Static analysis result for SHA-256 4762a47ae83b8df7…

MALICIOUS

PDF

46.5 KB Created: 2020-08-03 22:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 648adceda2a4ce29b5c30334cd643d8d SHA-1: ad9d973f341b910b9725628d94b7ca717a6d45e2 SHA-256: 4762a47ae83b8df718d15089940fbfe1936dea60c6d5945d454fcc67ffad2dab
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious link, 'https://ttraff.com/pify?keyword=public+health+nutrition+textbook+pdf', is designed to lure users into clicking by impersonating a textbook download. This link is part of a broader campaign to drive traffic to malicious infrastructure.

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.com/pify?keyword=public+health+nutrition+textbook+pdf
    • http://files.harmonizeyourspace.com/uploads/1/3/2/3/132302913/6922088.pdf
    • http://files.rainbowswithinreach.com/uploads/1/3/1/4/131408353/buxunenebabogaledaga.pdf
    • http://files.yuweifoodtrading.com/uploads/1/3/1/3/131379680/1855219.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/mewadaluwuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viruxirekosarobavogerij.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/likabimunit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8357326041.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/58981420347.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.pdf
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/binofijukezoguvawisi.pdf
    • https://cdn.shopify.com/s/files/1/0436/2731/5353/files/mo_creatures_mod_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/15727152350.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/40682465761.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_off00005441.bin
c8b74b735d8562bd3596b949d47f9161190b63fd54a6db7312ac3dc4a939ed4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5441 5336 bytes
font_01_sfnt_off0000665f.bin
81a5b15f68a32ae8012eec5318de44f03f6a5446bc19af7b7f847da5a29f6262		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665F 14696 bytes
font_02_sfnt_off000093ac.bin
c689877a285a1d4761bc2fbd8326861fc0f35ee81ba78d66f2e992cee0460977		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93AC 17256 bytes

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