Malicious PDF — malware analysis report

Static analysis result for SHA-256 0731416cf650c044…

MALICIOUS

PDF

53.1 KB Created: 2020-08-30 10:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a71c177135e7842963ab6a54dff61223 SHA-1: 5a5847bf8339b027d38d2829982043f92735f606 SHA-256: 0731416cf650c044b5e74d31638b0d1b006f4a1ded8fa5d2dca8e87e169289cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=banished+colonial+charter+guide+fr', suggesting a lure to a malicious site. The presence of numerous external links points towards a link farm or a phishing attempt to direct users to potentially harmful content.

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=banished+colonial+charter+guide+fr
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/87d215_1512a74f713c4ab89879fecadcef197d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d05008204cc4b7b92e86b7602ae428b.pdf
    • https://static.usrfiles.com/ugd/d1c05f_214f8de1bdfd425eab0521ec1de24ee7.pdf
    • https://static.usrfiles.com/ugd/0286dd_bdd6bf52077d4a6aaa10c43835eb523b.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/sanili.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/sadadomawopujavila.pdf
    • https://cdn.shopify.com/s/files/1/0463/3342/7873/files/45122753995.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/57552006602.pdf
    • https://static.usrfiles.com/ugd/b8c837_e125ae4e91294d01ae199ca72fba06ab.pdf
    • https://static.usrfiles.com/ugd/8b9728_c10ce85fd95c4513b9777059344031fb.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/orthographic_drawing_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/disaxekenatiriminemawapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/94303320102.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/97829885636.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_off0000937b.bin
96ffd48b22b38cd3e1ff2ddaa47c8ec7811b29db434a710064cb40fa3228a4e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x937B 5332 bytes
font_01_sfnt_off0000a586.bin
3699bfc635f5a17426dbf9cc9beac6e0b9683929161b1084f53c396ea6a4425b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA586 10060 bytes