Malicious PDF — malware analysis report

Static analysis result for SHA-256 0096d041b0bcc1a2…

MALICIOUS

PDF

49.2 KB Created: 2020-08-29 08:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59dda2bb289f3d241a1e2fb9e0c60b2f SHA-1: 41368c6a449f4512e8feda428f1ccf98f20309ce SHA-256: 0096d041b0bcc1a2567c21d2bd2cac0ee17833f9b6249bb5b422d3f016515b3d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is likely used to funnel users to malicious sites. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting a link farm or content distribution network used to host malicious files. The ML classifier also strongly indicated maliciousness.

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=wilson+dont+starve
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49181926903.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/19661117363.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/kijokidewebog.pdf
    • https://cdn.shopify.com/s/files/1/0451/2251/9205/files/jofuwujasekivotafiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/19356817257.pdf
    • https://static.usrfiles.com/ugd/b8c837_21cc0cae5a5d426ca3d9d6962460034b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e5904981fad4c5d9f59ff213e0e88e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_df087bd10e5f419e8aa4f439edae7421.pdf
    • https://static.usrfiles.com/ugd/b8c837_ccc1afd3305e43c09a1bb0b4e0afb32a.pdf
    • https://static.usrfiles.com/ugd/b8c837_25f4a55853374376ac28586243a8f969.pdf
    • https://static.usrfiles.com/ugd/b8c837_50fe07e373a0420ba5914f87ef2ddba0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d21579b3702248fe8052b3cb6aa524ed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/99624838882.pdf
    • https://cdn.shopify.com/s/files/1/0430/7081/6407/files/blank_space_lyrics_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/sefamileteg.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_off000084d7.bin
eae464b933a2ca93edf61c53eb2f14901dc2e064b8742b0eb5176382f0f8dccd
pdf-font-stream PDF embedded font (sfnt) at offset 0x84D7 4892 bytes
font_01_sfnt_off00009597.bin
db7751c1b2f2b8726c45d2c50518789791cbebe1c834595a0f8fa69d4195652d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9597 10060 bytes