Malicious PDF — malware analysis report

Static analysis result for SHA-256 106e378fa5e13112…

MALICIOUS

PDF

57.7 KB Created: 2020-08-31 14:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b5d755f3a857eaebf5e54e5f178c9f SHA-1: b498166639d3d13b97fc898f54a5ba87a1460116 SHA-256: 106e378fa5e13112647b51a3524a0f93db5670c4fff474b7fe4702048062e38d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Apple boot camp 3.1'. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the PDF structure and malicious link indicate a phishing or redirection attempt.

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.cc/wix?keyword=apple+boot+camp+3.+1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/metiliwetizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/xuposipadabuzeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0098/files/xiligusilawesaxarafiw.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce4376c3d3a342f391a01856abd891d4.pdf
    • https://static.usrfiles.com/ugd/d775a9_1e13f26f78ca482a810a905d6b2868e5.pdf
    • https://static.usrfiles.com/ugd/c12414_2104e827b635416b84b8a8c4700bd8e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_86b3e735cce247c796b4d063db64c3de.pdf
    • https://static.usrfiles.com/ugd/e33828_12f18e29e08347eaac539615984dd3a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_73340e03bf734e0db3ff44b49dbedbd9.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/budorunarebok.pdf
    • https://cdn.shopify.com/s/files/1/0435/8399/6063/files/sawonewasusadidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/46510937065.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/music_video_for_android.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ee6.bin
59d3628bf43579d25397204cb125286443c187ce0d2c0dd7b12a81206960b7dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE6 5180 bytes
font_01_sfnt_off0000a07f.bin
f332c7ef98f7fda94b069086c94b94700618543a9d19d9d9ba772cccb8fd7df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA07F 10688 bytes
font_02_sfnt_off0000c500.bin
02d633d18b4efb222d06cb19cffeedd67924a627ef45dadcb57719ff17a75919		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC500 16092 bytes

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