Malicious PDF — malware analysis report

Static analysis result for SHA-256 5745307fb25f2a0c…

MALICIOUS

PDF

47.8 KB Created: 2020-08-31 14:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afffedaa03e30463b086d41063b209db SHA-1: 4b185e964892f38ae525608e17d9dc380d1f89bf SHA-256: 5745307fb25f2a0cf7d95db15612e78c6ce703c9a3e7e53480124ffef9e00360
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, ttraff.com, which is associated with malicious activity. The document body, though heavily obfuscated, contains text that appears to be a lure for installing the Android Play Store. The presence of a link farm and a high ML classifier score further indicate malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure via a deceptive link.

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.com/wix?keyword=install+android+play+store
    • https://static.usrfiles.com/ugd/10a4aa_87b0711359364254b856bd95d711e35c.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb300e67e18847b8bad37b61f7f30ea1.pdf
    • https://static.usrfiles.com/ugd/57c819_0dda999ccf3841b199fc42f5ece0b1b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_66e615173dc842f485a4b6990aa8b426.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_e21aada022a34f198dc9783f7e473330.pdf
    • https://static.usrfiles.com/ugd/b8c837_b321b21320a64d7cbcbbbf065576e80b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6284ee5ef7f74cc293fa6d99cbb42d45.pdf
    • https://static.usrfiles.com/ugd/289c5e_e43a6c1b5ce647ccb29e9ffd0676d12f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb266e499a54490bb06de81e88ea0c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1ecf845b4e84769b685920271feb4ac.pdf
    • https://static.usrfiles.com/ugd/2e16aa_71e69bd01ae743528ca1f9d92d23958e.pdf
    • https://cdn.shopify.com/s/files/1/0431/4936/1314/files/accord_adjectif_de_couleur_exercice.pdf
    • https://cdn.shopify.com/s/files/1/0431/9438/4546/files/hitfilm_express_13_user_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070e4.bin
5195022f5110ac767d713a998af25a0670df1b6a9241f453ad67c64afba03c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E4 4780 bytes
font_01_sfnt_off00008123.bin
26b1f6854f43e43fbd0513b6001e83b03299dc8d075883b4b50bec0691135fc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8123 10364 bytes
font_02_sfnt_off0000a485.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA485 4324 bytes

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