Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f375e605caf7de4…

MALICIOUS

PDF

36.5 KB Created: 2020-08-29 17:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbba8b6a8500100653e51519bede9219 SHA-1: 69285940e894ae764fbdec5ff10cc2c5ceaeef3c SHA-256: 0f375e605caf7de4c2522cc12d4945e62287d6f26ae90d52af87212d9a40b037
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=love+me+tender+sheet+music'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links. The document body, though heavily obfuscated, contains the primary malicious URL and several other PDF links, suggesting an attempt to lure users to malicious 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=love+me+tender+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_007129948f614b2996fe80d13c8afa31.pdf
    • https://static.usrfiles.com/ugd/b8c837_66738736f2ad4c5b98e62a0b1133a496.pdf
    • https://static.usrfiles.com/ugd/b8c837_6842c2b36a42404caf4783df198271e6.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/34607473435.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
    • https://cdn.shopify.com/s/files/1/0432/9570/3204/files/93472201348.pdf
    • https://cdn.shopify.com/s/files/1/0435/1528/1568/files/19562256746.pdf
    • https://cdn.shopify.com/s/files/1/0440/6208/1174/files/best_sheet_vinyl_flooring_for_bathrooms.pdf
    • https://cdn.shopify.com/s/files/1/0433/5825/7306/files/biological_and_cultural_factors_in_human_evolution.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aecc89c16794de0bd20c4facf33b5aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_671c8c852bd8412b8eb3fa29d4ddc315.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b161b164b5f4d57951872d53b4992f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_05f288aff3d64d7496fe0bdac36ce92d.pdf
    • https://static.usrfiles.com/ugd/b8c837_499c8ad6c9ab4dd1a51819844814866c.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_off0000528e.bin
c99e7a39dd4843379b64ff68cd5164e5f7a233ce8d724561712e45597a7e404d
pdf-font-stream PDF embedded font (sfnt) at offset 0x528E 4936 bytes
font_01_sfnt_off00006336.bin
c00f8d330395f5064e550216ba6cbead4151e7dfef397941764c0d268f590de1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6336 10060 bytes