Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfa32fcac6fa216…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 21:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02343b579f4fe753086dc313c747d366 SHA-1: 086c98c32b4f19526c359d13d312a26ec66e3173 SHA-256: 5cfa32fcac6fa2161bb480594115f6ea80898d122ce131c31417c62d6350bfef
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'operations management' and includes the malicious URL. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=operations+management+11th+edition+heizer
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/defcb2_7564966df6bb47f8a8f0a118d42970a5.pdf
    • https://static.usrfiles.com/ugd/067ecb_44f262635d09491395736bbb18318316.pdf
    • https://static.usrfiles.com/ugd/b8c837_f46f58385619404488cd035471c1ba86.pdf
    • https://static.usrfiles.com/ugd/87b9a8_002a5787faa24ef3b43e6b230291ca11.pdf
    • https://static.usrfiles.com/ugd/345929_846babf7136843ae895222682a8ec1e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_df6601f92c884f0786c7ba4c1e132fd1.pdf
    • https://static.usrfiles.com/ugd/405339_b3ce4fdde285483ea0d85878c1252e43.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_5b26e0a7009348c3b704ac0dcd7c2ee2.pdf
    • https://static.usrfiles.com/ugd/b8c837_40f97e0fbb804426817f6eb5bfaa3cf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a17e330b4a9c422fb9b634a2ac92d295.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad01e4458ed1442e9f2792d5686f9ff2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8216c9bf4324cf5874bee636da1fb24.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef21abd4d10d4d0490ede476d398db3f.pdf
    • https://static.usrfiles.com/ugd/6f58fb_2d597974e8e2440c91cd9817ca0c93c6.pdf
    • https://static.usrfiles.com/ugd/de3d83_5ebf12c670cb4ba8aa5fab2ed75077f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7d4c758886f40a9b6d0af59fc2fe025.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061dc.bin
2444bd338c234c4aa38090f528e5ac5034f85d162db74e71c89e0cd9148ed6eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DC 5472 bytes
font_01_sfnt_off00007449.bin
bdcd961ee063ea4ea9ca56d634071dfb3ef294b41110832c0b431539ccc3cd12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 10724 bytes

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