Malicious PDF — malware analysis report

Static analysis result for SHA-256 06771f5c8e9d67c9…

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 15:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbaed1b465973d369f2053efa1813280 SHA-1: a35be505509fa76a03c854baae5ff6700bf628f0 SHA-256: 06771f5c8e9d67c9a9d453e84c9cbaad332776642b78b119ec65a5bfd50d1e1e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=manual+mode+photography+quiz', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and other links to PDF files, suggesting a link farm or redirection tactic. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to lead users to harmful content.

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=manual+mode+photography+quiz
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0dd040_a06d9475504442c68523b21af3509c16.pdf
    • https://static.usrfiles.com/ugd/87d215_79321a89e4e1440eb3b3c770a662d565.pdf
    • https://static.usrfiles.com/ugd/5a1791_977beb097b874158bdbbd51049926dbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c08e2b32d974bb4bce95ae801a6f177.pdf
    • https://static.usrfiles.com/ugd/b8c837_5156146dd94d42c391dd8b185ecb2520.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f9da7a8eae34e5f9772df950833587c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a12568969754dccaee4bf1f88b6d39a.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/94406673278.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/73305830591.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/47641430051.pdf
    • https://static.usrfiles.com/ugd/7198c1_34919c37b57748068f51d7cadf58966a.pdf
    • https://static.usrfiles.com/ugd/b8c837_808dcbcd55bd42d580d2a6857c57554a.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_5542e411202c433a96a1ac42fa682e82.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_off000065fa.bin
17687b529c53cf93ee18923633e07c3fb50da03890a41d7b15a0044e80c08373
pdf-font-stream PDF embedded font (sfnt) at offset 0x65FA 5476 bytes
font_01_sfnt_off00007876.bin
460e4cd68b927a2b21fd98bcac443437dac22f3f4b732189db1500addd7978e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7876 10600 bytes