Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bcfed57c855bd03…

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 10:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1ac29d011afad2749d78540179476b5 SHA-1: a8279cd5ed4388d76ab0ac4547f77572de02b86d SHA-256: 4bcfed57c855bd0388921114e25a8a6d6e5119694471ae9c933895d414da5f93
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a direct link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially distribute malware or conduct phishing.

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=dead+or+alive+3+xtreme+guide
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/89976211223.pdf
    • https://cdn.shopify.com/s/files/1/0439/1570/6523/files/eulerian_video_magnification_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/37682807847.pdf
    • https://cdn.shopify.com/s/files/1/0459/6708/1639/files/sample_authorization_matrix_template.pdf
    • https://cdn.shopify.com/s/files/1/0463/3532/8417/files/physical_constants.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_b951760e51fc40d8a1d3509158a3141b.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/network_topology_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/acute_respiratory_distress_syndrome_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4330/files/kixarazuzogezebafifok.pdf
    • https://static.usrfiles.com/ugd/b8c837_477a9aa39b4845dcbe26f16521782329.pdf
    • https://static.usrfiles.com/ugd/34e21e_41818764d6e24c0aacd005f14296f0a5.pdf
    • https://static.usrfiles.com/ugd/5899d5_e969298280124413b72678332965578f.pdf
    • https://static.usrfiles.com/ugd/e6092c_d7f47b9713b14ee59f33e95aa5325d1d.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_off00006863.bin
75ec2f6fb65c4052fe517d7caedde4b5ed2e35628c70c9dadbb32fb48a61fc18
pdf-font-stream PDF embedded font (sfnt) at offset 0x6863 5256 bytes
font_01_sfnt_off00007a40.bin
302bc86e44b14735dc621e23dfd593975a260a58ac7f0812ecbc956494caecad
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A40 9964 bytes