Malicious PDF — malware analysis report

Static analysis result for SHA-256 89316fff75be8c31…

MALICIOUS

PDF

47.5 KB Created: 2020-09-12 05:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0256ae7cb585101cef798660e70034b2 SHA-1: 5dd1c4c59e6dd063349c80a6fad7ebee8cc05e3a SHA-256: 89316fff75be8c31b859a16747e3cacd03316207574bbcc1377369a6f0ef752a
162 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to distribute content. One critical link, 'https://ttraff.me/wix?keyword=30+day+eviction+notice+illinois+template', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.me/wix?keyword=30+day+eviction+notice+illinois+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/9997/8904/files/mapaninozazaguro.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/42099619717.pdf
    • https://cdn.shopify.com/s/files/1/0465/1607/6694/files/vewebewedovoruzo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/pengertian_agama_islam_menurut_para_ahli.pdf
    • https://static.usrfiles.com/ugd/37428b_e13e228014d0483dae4ecb5803581821.pdf
    • https://static.usrfiles.com/ugd/15ebe2_077a8e66b68c497bbcc5a2829f1c7c53.pdf
    • https://static.usrfiles.com/ugd/9d7ad9_1f9708eb8fba4e2a96e283ceab8b91e7.pdf
    • https://static.usrfiles.com/ugd/e42c35_5c5096cf13254aad8905875b8ea97b9e.pdf
    • https://static.usrfiles.com/ugd/ed8107_9c1d7b472f3f4dabb3637aa23d46dbd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_614345f4df674ab5bdd4266c150813d2.pdf
    • https://static.usrfiles.com/ugd/8c2e83_fe6475da557d462bbe29c2d8d8c724b2.pdf
    • https://static.usrfiles.com/ugd/a4ea6c_b686f3438274436a8f5743e07f80b1ae.pdf
    • https://static.usrfiles.com/ugd/3e87bf_ce194804a6ec4ba9897657dc74a124f9.pdf
    • https://static.usrfiles.com/ugd/e78b77_ec6505ab1bf8445ab991c4da273665cc.pdf
    • https://static.usrfiles.com/ugd/9c66ff_bc95e75b11734120adbf568b00f4874b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e23.bin
7dd5722089ae332bd08403066d025182174908cb243a6b5300ca21379d992b08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E23 5284 bytes
font_01_sfnt_off00008002.bin
2cf391ec2e8a61cc27550a09b97f0bb4d0d1383299794f0f93103f04f4b29098		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8002 10304 bytes
font_02_sfnt_off0000a32c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA32C 4324 bytes

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