Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7b03ff33a4d330…

MALICIOUS

PDF

45.9 KB Created: 2020-08-07 03:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71735925bae79043fe491de323402cd3 SHA-1: 54678a9a8860cd65947a4ebee5158b4317c3f813 SHA-256: de7b03ff33a4d330d67ed2a9052987095e462f49ac2301ff7c3e13f9b8453172
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a known malicious redirector at 'ttraff.com'. The document body and embedded links are designed to appear as academic material, likely to trick users into clicking the malicious links. The primary heuristic indicates a malicious redirector link, and the presence of a link farm further supports a malicious intent.

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=mass+moment+of+inertia+example+problems+with+solutions+pdf
    • http://files.mrsbartelsphysics.com/uploads/1/3/2/7/132740502/tigelotiziv.pdf
    • http://files.gilfordfreepresbyterianchurch.org/uploads/1/3/0/7/130775432/335b83154838cf.pdf
    • http://files.achespainssprains.com/uploads/1/3/1/3/131379590/162598.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/zaxozatulokadu.pdf
    • https://cdn.shopify.com/s/files/1/0448/0398/1463/files/o_capital_livro_3_boitempo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/tobalubikixireburojogi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5209/5898/files/kevumogun.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/xapijonojifupirunebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/zinafopunupopokonejajitip.pdf
    • https://cdn.shopify.com/s/files/1/0434/2700/4577/files/24378992238.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6844/files/welewurilusur.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/zalubotum.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/80677691595.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.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_off00005c08.bin
f9ed14617ae9f9db6ae4a9ac07abad34eea80ab5b65b05a4ce410f0eb672d0ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C08 4532 bytes
font_01_sfnt_off00006c4c.bin
ff47289f5e6c2a3f896aef4294a1ff91c39820cecfb62af3aefc50f25c32a214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 5588 bytes
font_02_sfnt_off00007f3c.bin
94bf0e5a847918b3abfd0415acb7029d95a16a38c08bdb682e60fe92e9b9058b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3C 13516 bytes

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