Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4d8150e34d1478…

MALICIOUS

PDF

33.6 KB Created: 2020-08-31 23:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c394b07c2b74ddeca20ff4b87baa7d1c SHA-1: 50a095855d346f3565d795e8b354202b851832bc SHA-256: 8a4d8150e34d14782faa6b8de134fdb68492454651301575ea9ded838373796f
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One such link, 'https://ttraff.ru/wix?keyword=transitive+and+intransitive+verbs+worksheets+5th+grade', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=transitive+and+intransitive+verbs+worksheets+5th+grade
    • https://static.usrfiles.com/ugd/b8c837_75560a67bc894a448044a18ddd58077f.pdf
    • https://static.usrfiles.com/ugd/ac51ce_a9810be2079e41628150af63fc70fd54.pdf
    • https://static.usrfiles.com/ugd/cc14e4_405fc8c787a84a98997a4f715108b98b.pdf
    • https://static.usrfiles.com/ugd/a64c8c_5f22b4de4b824ceba48dfa228909bbb1.pdf
    • https://static.usrfiles.com/ugd/eed56f_597c8783e28b45f68e82f270dc57cc40.pdf
    • https://static.usrfiles.com/ugd/50c35f_07ff29d2e27c4bf495b161e68b962082.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8165/files/zazobixikegejokobokew.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/lamborghini_wallpaper_4k.pdf
    • https://cdn.shopify.com/s/files/1/0433/1343/0686/files/16259596275.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://static.usrfiles.com/ugd/49be48_0dcfccc27f1349959613b9225ae5bd91.pdf
    • https://static.usrfiles.com/ugd/b8c837_e285629aa57b4869b8e57c127a89b030.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_off0000462f.bin
7867d67bd1657f258df64068ad6de035aeebbda00a63a83c9358920d2b404bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x462F 5484 bytes
font_01_sfnt_off000058e4.bin
ba04ed91ab4369744fd6f5bc55fade514b65c3e1b4014c3e48894d18b5dfe251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E4 9476 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.