Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc1da32282dae65…

MALICIOUS

PDF

45.9 KB Created: 2020-08-02 02:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 996f4ccf9bee8941358c9f6876c49b5d SHA-1: 589eff74b6d3fdc7047188ad49fb8e9375ead6f7 SHA-256: dfc1da32282dae65a84968d6ab099f10bb716178c154102af17cd739703b887b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is ttraff.ru, which is used to redirect users. The document body contains obfuscated text and embedded URLs, consistent with a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=xml+package+r
    • http://files.henleynaturalburials.co.uk/uploads/1/3/1/6/131636775/teval.pdf
    • http://files.beyondthegap.org/uploads/1/3/2/6/132682110/rujifana.pdf
    • http://files.fishdig.com/uploads/1/3/1/4/131406935/62860b0a315cf94.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/28546169806.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99203043279.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/shrek_s_thrilling_tales.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/bowakivanutodij.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/31413050366.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/performance_based_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/3524/7271/files/92006903900.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6341/files/nezokif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijob.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_off00006667.bin
2af86dec628bfb7e552a07283b55871091732a1b377347e7ad95dbf3829ebdee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6667 5116 bytes
font_01_sfnt_off000077ba.bin
339cf4e03145991e9a98680f715dc9bac38878e88260dd136c3dc904625a3573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BA 16068 bytes

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