Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3b84fbf1a5b244…

MALICIOUS

PDF

36.7 KB Created: 2020-08-29 19:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df046af24c5434cc1587acbcd68e764c SHA-1: e4f9266201dc7d9cc31a5779e7b543605eb30f79 SHA-256: fe3b84fbf1a5b2447dde4eb82262bc83fef0e0f3c713740776457cbc22accc95
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is https://ttraff.com/wix?keyword=watch+madea+big+happy+family+the+play+online+free. The document body contains garbled text but includes the same malicious URL, reinforcing its purpose. No scripts were extracted from this sample.

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=watch+madea+big+happy+family+the+play+online+free
    • https://static.usrfiles.com/ugd/b8c837_e5adc04bb8e148e19018b756e5eab315.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5e2d96e8b664eca90f671195c5a7cb4.pdf
    • https://static.usrfiles.com/ugd/5b9a87_3ce9fc3f7fa04c96a85d8358e1fcd105.pdf
    • https://cdn.shopify.com/s/files/1/0463/7248/7323/files/minecraft_galacticraft_mod_1._12._2.pdf
    • https://static.usrfiles.com/ugd/b8c837_31ae5b9fda44486e9c06b3ae4c9525ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d3cdd267ba24013aa003dcf96d5fa4c.pdf
    • https://static.usrfiles.com/ugd/09273f_6c2444317b6045f29b4c1c3ab9c41106.pdf
    • https://static.usrfiles.com/ugd/b8c837_df04a3c7bfc34e81a87a5fd656363619.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ae7500b4a6e419fb4371d4f923e6e19.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/make_smaller_file_size_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/9644/8917/files/bamafidanimipuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/34017377576.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f3f.bin
ed54079090feb854e5eac2efb27c7dee030b5d58570394390011be52924ec54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3F 5648 bytes
font_01_sfnt_off00006253.bin
ce059c724de41bbd83dc78418b444e73b97b123051f9016a5e8adad89b2468c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6253 10488 bytes