Malicious PDF — malware analysis report

Static analysis result for SHA-256 722cd97437f77884…

MALICIOUS

PDF

49.4 KB Created: 2020-08-18 14:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86f5e585845376e8cf99b03439a6f217 SHA-1: e3c9d56964ad32747bd8bab07eb445ca22a32d7a SHA-256: 722cd97437f77884fd2292116620334b01ed90c0dd43f17621a86e3046d6a088
194 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to external resources, with one critical heuristic identifying it as a malicious redirector link. The document body also contains a URL that is likely part of a social engineering lure to install a browser extension or update, a common tactic for credential theft. No scripts were extracted, but the presence of numerous links and the social engineering lure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/pify?keyword=template+literals+in+javascript
    • http://mibipazux.msnlawoffice.com/uploads/1/3/0/7/130776167/8328757.pdf
    • http://vezet.livolivo.com/uploads/1/3/1/4/131437079/8477288.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/fifa_15_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0428/1057/2967/files/lutetamil.pdf
    • https://cdn.shopify.com/s/files/1/0435/7550/9155/files/36734454148.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0117/files/factorio_high_tech_science_pack.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/70123525362.pdf
    • https://cdn.shopify.com/s/files/1/0443/3759/4524/files/57196431553.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/english_thesaurus_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/vinemebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/wewuwulodurer.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4250/files/craftsman_multimeter_82141_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2774/files/61959683920.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006102.bin
800d9bb6ba3c9496a6b5475fd7cb99f119d3211ceb4e3e68dc04fac0a75f6240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 5164 bytes
font_01_sfnt_off00007275.bin
c9b5c4904a063eda2fd006e21c0d11b7d9e09ba17605c18bcc17455d537c1e8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7275 3120 bytes
font_02_sfnt_off00007efb.bin
853b055ac26b311ceae19cd9842a227d66df8f6c4ce0981eb31a6b53aca5081a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFB 10640 bytes
font_03_sfnt_off0000a392.bin
e2237bcfba2ad8a8c6238a86fe0fbf220db2b991d1f402b1dc0856d9f6c5f988		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA392 16076 bytes

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