Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5a3a52597ea726…

MALICIOUS

PDF

61.9 KB Created: 2020-08-29 20:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 281737c9e773f8a5de7df547a57c8db5 SHA-1: 270c51f5642cd87b8597a640431a3ac1780ad9fb SHA-256: ec5a3a52597ea72630f9e99cc653e21a37299ec67d1bffc210417aa987b593a7
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of external links, many of which point to a redirector. The primary malicious URL identified is https://ttraff.com/wix?keyword=amme+suresi+dinle+oku+fatih+%25C3%25A7ollak, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains references to this redirector URL and other PDF links, suggesting a link farm or redirection scheme.

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/wix?keyword=amme+suresi+dinle+oku+fatih+%25C3%25A7ollak
    • https://static.usrfiles.com/ugd/b8c837_4001a1d077f04dfb8ff7ec805c7a4879.pdf
    • https://static.usrfiles.com/ugd/b8c837_55ccc61bb7a942039f0ba64841579924.pdf
    • https://static.usrfiles.com/ugd/8de238_fb1e469e56e54e5d81ffedbaf7a4b93c.pdf
    • https://static.usrfiles.com/ugd/b85eb0_fb777a28da734504978653a32258dcdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_336d3089a682468f804f0b8855b4b0a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6179b3ed0bff4befaad311c9379ff390.pdf
    • https://static.usrfiles.com/ugd/b8c837_115ae9c193484922906247c9ee7ae7dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b092887eafa442484de6f598e3e6a7b.pdf
    • https://static.usrfiles.com/ugd/33a2e4_2b723b3bf3804598ab557c05daf029af.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4b03884629341b3828cbef30e5734d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_2194ea78d2544d08ad7d57aa5fd3d928.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b330540573f4b00a02c3cdb65c57ae1.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbd68313aa79451b801647f1eb970551.pdf
    • https://static.usrfiles.com/ugd/b8c837_a869ed50d9514b0c9edd6909e39da331.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc9f5a679e1948a0bc660624708cd1f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_74d288e799504b99958d9226f29c1549.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_c28b6fdc3bfc40e2a74aaefffa660e7f.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087c9.bin
087a6734e37ebbe485b4104e49a8e7d2c40df2b038f0cc038cd12c21e3448b8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C9 5264 bytes
font_01_sfnt_off00009974.bin
1a84ebd32e3b77836483a92b8a181b2a90cd22b5b614c055d6af49ea35ef2df8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9974 11988 bytes
font_02_sfnt_off0000be8c.bin
8308c16f380eba1aa75c15b14a816b9b0d2bd68fd83519a94b8fb42f8f3a0889		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8C 18160 bytes
font_03_sfnt_off0000da1a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1A 4324 bytes

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