Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b2cc76a6f76b74…

MALICIOUS

PDF

128.6 KB Created: 2020-07-23 15:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b462ee28eae25a464b270f5e7b02a685 SHA-1: d6adf935a1d47bcfdd36e7873d754ea9963569b9 SHA-256: 07b2cc76a6f76b7403bd78af6200f4afaca7804a4ffb10603b0319edf0bf8eb2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains references to 'jfet datasheet' and 'wkhtmltopdf', suggesting a lure to technical documentation that redirects to malicious infrastructure.

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.com/pify?keyword=2n5484+jfet+datasheet
    • http://files.iscypaa.org/uploads/1/3/0/7/130775196/kedarowufo.pdf
    • http://files.futurestarsathletictraining.com/uploads/1/3/2/7/132712006/2406388.pdf
    • http://files.preparepublications.org/uploads/1/3/1/1/131164310/gaforoj_ladupedaxu.pdf
    • http://files.springcreekranchclublambs.com/uploads/1/3/1/3/131381112/2bddeaecb650.pdf
    • http://files.electaylin.com/uploads/1/3/2/7/132740320/8322645.pdf
    • http://pdf.datasheetcatalog.com/datasheet/calogic/2N5484.PDFis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/lufisoju.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/gifepizanakilokajevutinef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/xuwokojutoxilitoxural.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/junirogagokigivejuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/zosirixexup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0484/5465/files/51936368774.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/57274623141.pdf
    • https://cdn.shopify.com/s/files/1/0431/0083/1905/files/gubipadirev.pdf
    • https://cdn.shopify.com/s/files/1/0432/4448/6811/files/niperifituroxudazowojefuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/nugameja.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000196f2.bin
20f56b1d4cdc6b87db53113ef3f6a66df90e58d6f81ef46036bb9fdda9380d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x196F2 5016 bytes
font_01_sfnt_off0001a7f8.bin
5b6d0299272a71a696bde0fa9af300ad0e3777438afd29a60552ca3a45a77729		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7F8 17316 bytes
font_02_sfnt_off0001dd0c.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD0C 16204 bytes

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