Malicious PDF — malware analysis report

Static analysis result for SHA-256 119cd2e795923071…

MALICIOUS

PDF

37.5 KB Created: 2020-08-29 23:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbe489cf3380be3dd680affa6e2d3097 SHA-1: cc4677f65a194425c11f2ef0964203f1a59372af SHA-256: 119cd2e7959230712b5a52b97c9a344347f9a26b8e399feba25dce693a86df8b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, includes the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to obscure the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=lurpak+unsalted+butter+nutrition+information
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/11f207_34dbce154ac24ba3bb71c240b30416b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf257bcf4967410988f926d4b61bbb70.pdf
    • https://static.usrfiles.com/ugd/3f80ec_aaa2d891a96a40e995184507bd516988.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/kegoxemalamuwojon.pdf
    • https://cdn.shopify.com/s/files/1/0434/2818/4215/files/pathfinder_sorcerer_draconic_bloodline_build.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/masifov.pdf
    • https://static.usrfiles.com/ugd/b8c837_24f40ae37c9043b6b7bc1a45d3cb2a28.pdf
    • https://static.usrfiles.com/ugd/affb4a_8e0b47dad6a3437eba30e12e5685ce0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd07f6ef87b340d2a6c5b276204ea7e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d131643174e403598696e0872934691.pdf
    • https://static.usrfiles.com/ugd/b8c837_617fdbd2671548e68497e571a57e0c68.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7e32b66f6294d6b98eaf0221bf5f332.pdf
    • https://static.usrfiles.com/ugd/b8c837_79eeae42dda942149e7ae1774aa040b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_16bf48bd082c452bb919ec2e4d5c69ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_935a8343ec544018a841e5ed105e3f9f.pdf
    • https://static.usrfiles.com/ugd/f515ca_9a1171de335b4f60a0885b5fc4387f97.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cba.bin
32029a64dfbfe8b1141b6a023a83fd8dce5e4b77680e4d34bc4da8d292abd8e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CBA 5332 bytes
font_01_sfnt_off00005ec2.bin
3ca38d741460d24f4e6a67c12a9e377133fb49330d750ea47c7802dbce23a69a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC2 13384 bytes

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