Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bdf4715872c310…

MALICIOUS

PDF

38.2 KB Created: 2020-09-18 21:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ed69d16ee52d3750c8fdf75f9e8a104 SHA-1: 26c761e7599be78e1e0b96817c4a0161c247c0a6 SHA-256: 62bdf4715872c310b66c79a24cd8278deade23ca4f51120372955668f61e92ec
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests a tactic to distribute malicious content or engage in SEO poisoning. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or spam campaign, likely initiated via spearphishing.

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.link/wix?keyword=2001+chevy+malibu+manual
    • http://siwitiged.banglauniversalsociety.com/uploads/1/3/1/8/131857631/5079192.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://aad1cd90-b90b-4588-8345-5a01583b6219.filesusr.com/ugd/daca0d_06f904715fc248a2af4e522a708edcd9.pdf?index=true
    • https://1379442b-4fd9-4acf-b2d9-87becb4b3f6f.filesusr.com/ugd/53c654_8a514c40dd5048d494d5f7315fb44aec.pdf?index=true
    • https://3e14b02c-d15b-4962-a584-e570f1288335.filesusr.com/ugd/694d5d_24c6f16544f04a9183c9c787d56b6816.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/8797/8905/files/akame_ga_kill_incursio.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/38188354518.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/godofelujivenuxugofunuvid.pdf
    • https://cdn.shopify.com/s/files/1/0438/3683/3952/files/canon_lide_300_scanner_datasheet.pdf
    • https://950f9f04-f8d9-44ad-9a04-beaeb4cea640.filesusr.com/ugd/cacfd7_61982d69ca3748138636bbd6065c1ba2.pdf?index=true
    • https://c727bae2-6309-43a3-bec3-a9bfde84961a.filesusr.com/ugd/df73ab_11036f0ba4004bd2ab873968f2be8322.pdf?index=true
    • https://c7e4ec35-2cd4-43f4-bc5e-f7208dcb6ec7.filesusr.com/ugd/5af86b_1ab0ae50667344a2ac71fdb15419f796.pdf?index=true
    • https://c3b7ebe0-8102-45f3-a5c0-a76f4cf0c462.filesusr.com/ugd/8e66a5_b95f9daaa20f4c6c940f2e526905074a.pdf?index=true
    • https://f60d48f1-2051-47a4-92d7-8b7a1d66d082.filesusr.com/ugd/d17951_e801151b21fb403392df152a9c8bf7d5.pdf?index=true
    • 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_off0000588e.bin
051bfb34f4b6c7eda9106416c8ede42048594ef73b7611ec1b70888175d74d6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x588E 5300 bytes
font_01_sfnt_off00006a82.bin
b2d3c68fe23299bd2c21bc3f8648506b8d89ab2607a32531218e34c40fffbc6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A82 9896 bytes

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