Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00f7e92f967e360…

MALICIOUS

PDF

39.1 KB Created: 2020-08-02 05:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbca7a693a24d7d6b2a77db31f611bd3 SHA-1: 6f8e0b07b2d7eb368710bb0ce084580ed3af430e SHA-256: f00f7e92f967e36013d1e0ee7399de334845bc3b5e3c0f642c7420dd1f694874
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.com, which is disguised as a guide for copying text from secured PDFs. This suggests a social engineering tactic to lead users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous embedded URLs, many pointing to Shopify domains hosting other PDFs, indicates a coordinated effort to distribute malicious content.

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/wb?keyword=can%20you%20copy%20text%20from%20a%20secured%20pdf
    • http://files.revmelodyann.com/uploads/1/3/2/6/132680869/loguduwaxemodaxul.pdf
    • http://files.beautytechcommunity.com/uploads/1/3/1/3/131383483/liwaritewa.pdf
    • http://files.wingchess.com/uploads/1/3/1/4/131453484/1a6d89221964.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/fegumagoguxebotadin.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/jezerareduxovopivawojoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/6765556976.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/fexudarivaxebixabuvapabuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/zetikibuwemewavutepu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/71343441046.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/8894630480.pdf
    • https://cdn.shopify.com/s/files/1/0428/2020/6758/files/13587534154.pdf
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/windows_update_kb_3035583.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.pdf
    • https://cdn.shopify.com/s/files/1/0434/0088/8483/files/xivugobapigov.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be7.bin
68870551b60c9fa81131ad78f2329ab7f0083797ef8c51ba110c7c2ab1bd13bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE7 5344 bytes
font_01_sfnt_off00006e0d.bin
d419e620c5f0cafb7eeee89aa5c41cd3fb97c27b1c9335d006cbe5d4675522bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0D 9896 bytes