Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e2539477c6a50b…

MALICIOUS

PDF

36.5 KB Created: 2020-09-02 10:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae23cd1f697692e3c37a62f18e0fc7c6 SHA-1: 8a8cf9cf3d3c67c75ec50c980acc9619595e8a5c SHA-256: a1e2539477c6a50b6411f6898418266ccc2fe2f11d3326bf1f51f28a7c363317
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a lure related to 'Avengers 3d game apk'. This indicates the PDF's primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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/wix?keyword=avengers+3d+game+apk
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/xuxezon.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/beko_washing_machine_10kg_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/bifuvof.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/rafuzunakotutemuzigijare.pdf
    • https://cdn.shopify.com/s/files/1/0451/0292/3939/files/guitar_chords_chart_file.pdf
    • https://cdn.shopify.com/s/files/1/0438/7949/7896/files/jixarekikomozedolaneri.pdf
    • https://static.usrfiles.com/ugd/e1d12c_b9c5ea4ef8ac44c08c745ff78d3e583b.pdf
    • https://static.usrfiles.com/ugd/cc03df_d4eae6ff2fbc4b38852cb34c1ea6c72b.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_738d89aa0f4f4f33971bbb8aa730abdd.pdf
    • https://static.usrfiles.com/ugd/3e9e83_436b562cf0bc4505804ae62198c3b5de.pdf
    • https://static.usrfiles.com/ugd/516793_12e8ca18c10e417aa7ad76ffcd95e533.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/41440986785.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/lusozovolosaxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8752/8103/files/free_caterpillar_service_manuals_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/nebekisesaxeninimevipowul.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_off00004e8b.bin
82d0c602d8b12738a91584602ddab2ef57319f77916a4025ebd3c78ee1df02c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E8B 5524 bytes
font_01_sfnt_off00006158.bin
a42769b2d5f5a786c7adc2fa97f13db52fcd91699d715f44f3344982bc8a2bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6158 10360 bytes

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