Malicious PDF — malware analysis report

Static analysis result for SHA-256 016cb04e1df64818…

MALICIOUS

PDF

58.5 KB Created: 2020-09-12 11:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 639493054ec80efc7cbe6b1027ac5df4 SHA-1: f605742d9b86bdd1affb0c21879e9d7d0c0d9273 SHA-256: 016cb04e1df64818935fe16cf346494ac1c7ad514854a5ae571cc330bc8e547b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=new+us+military+uniforms+2018', is likely used to redirect the user to a malicious site. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=new+us+military+uniforms+2018
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/74a852_ffdd879d4d434e37a8d45790bb6b17cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_48aad82aea9f4dc9ae1c5ac7a2329b86.pdf
    • https://static.usrfiles.com/ugd/a07927_47011838b2164c92991c77dc344d5e5e.pdf
    • https://static.usrfiles.com/ugd/37987b_70a43bcdc8dc4569b6060b7cedc6bb31.pdf
    • https://static.usrfiles.com/ugd/b98abb_eb5ad6dc485442e4a228d4c79bec8096.pdf
    • https://static.usrfiles.com/ugd/61c57f_c4db65fe7f3e4bc69cb4cc00ad77193b.pdf
    • https://static.usrfiles.com/ugd/1f2646_b69057790e0945f4a77ebf821c113d2a.pdf
    • https://static.usrfiles.com/ugd/48f461_d07e3ffcec1c4d019cc879af7ee07f02.pdf
    • https://static.usrfiles.com/ugd/94e5ef_431b6e9fcc224b7e841555d43f3af8e5.pdf
    • https://cdn.shopify.com/s/files/1/0432/7876/2140/files/tasotafuwegatilujad.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/ap_stylebook_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/6788/1125/files/98709506132.pdf
    • https://cdn.shopify.com/s/files/1/0430/8605/3527/files/employee_scorecard_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/whatsapp_para_blackberry.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0652/files/energia_hidroelectrica_ventajas_y_desventajas.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_off0000a7d4.bin
d84187fdeb7aae787204cb7f4d31200dd1ec54f8a29a41593ceec9efc1878b41
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D4 5596 bytes
font_01_sfnt_off0000bae5.bin
1d52fcdf275f5fbdbd3d482d6bd5adb1d46a5fcae5432df199749f96f10adc84
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE5 9980 bytes