Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2be33f2cd6130c…

MALICIOUS

PDF

52.1 KB Created: 2020-08-29 18:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db54c8de2b7808b4764af13b39b92a63 SHA-1: 97d322526fd389711f4757bca7c36235bb3a8a6d SHA-256: 7e2be33f2cd6130c23c9627d9efead073c37c371a2ad46fac309b593cffaa8c8
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=silicon+valley+season+6'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the primary attack vector appears to be social engineering through deceptive links.

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.ru/wix?keyword=silicon+valley+season+6
    • https://static.usrfiles.com/ugd/b8c837_b1054495f0e94cb0a6339e3c4811fb71.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f0bf7f317ba4715b95a6a4860e06e8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d38277e2a9b847398950cba23cbe59a6.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/9853085564.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1660/files/answer_sheet_in_french.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/jesaxarenoboru.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7078/files/25562231425.pdf
    • https://static.usrfiles.com/ugd/b8c837_edc23c0009a0451db847f24e5f13d090.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_81207a946405420abd7d201f856cb61f.pdf
    • https://static.usrfiles.com/ugd/bf650e_2eedd018e7714ff29a33103faa807cd9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dc3a6cc412c4f74a54d1d6571b24b38.pdf
    • https://static.usrfiles.com/ugd/b8c837_adac84e0dc6744afb4056eeeafe5fbc6.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0590/files/76543630101.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/9535939463.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_off00008d6b.bin
b1a33c74220394b1a18c8f966055a98ed94ff6bd946ba5bfb76ed8cf59b36f4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6B 5116 bytes
font_01_sfnt_off00009ede.bin
8edd2a0ba63637e6fc936e4a7961dbd6ab031ca2a725f58d3604be341b3ece73
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EDE 10660 bytes