Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4cc2a573f9f780…

MALICIOUS

PDF

44.6 KB Created: 2020-08-31 00:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e3e6cfc71e9cdf26db715060be39bbc SHA-1: fb9e7347b146096ef7ca9e184d251b6af25318b3 SHA-256: bc4cc2a573f9f780e9b3e4f31f860a533809476132aaa7789e4f676ac39aa9fe
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'the cricket in times square online book' and the malicious URL, suggesting a lure for SEO spam or phishing. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates a high likelihood of malicious intent.

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=the+cricket+in+times+square+online+book
    • https://cdn.shopify.com/s/files/1/0439/0119/0299/files/87375820086.pdf
    • https://cdn.shopify.com/s/files/1/0431/0751/6565/files/25480287507.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/75548791610.pdf
    • https://cdn.shopify.com/s/files/1/0433/0382/9657/files/roller_coaster_ride_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4885/files/58184645268.pdf
    • https://static.usrfiles.com/ugd/b8c837_47b75c2ec8b442cbbc60aa9968ffe8a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d3cc17852454d7e8de1d08a46563404.pdf
    • https://static.usrfiles.com/ugd/b8c837_20d82a16a88e4f5791e57b7def2b1a52.pdf
    • https://static.usrfiles.com/ugd/9904c2_07943037982b4ea4aacfac609a97abbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_60e58ff5224a480da5784657af1b4e42.pdf
    • https://static.usrfiles.com/ugd/6f53d7_9fc954005c2c4f23903fb6401f3eb349.pdf
    • https://cdn.shopify.com/s/files/1/0448/8026/5383/files/32356021675.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/19845055222.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/wavufu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4349/4807/files/inverse_3x3_matrix.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_off0000703a.bin
919c061ee943645e68c33df0cadb7c39ad2df2c4f9d8277dcde1230718bfa2af
pdf-font-stream PDF embedded font (sfnt) at offset 0x703A 5320 bytes
font_01_sfnt_off00008221.bin
6f51f7dfc3c7b368745177e422293dd56934fb4ecd70afebc094ef3ccb9a939d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8221 10172 bytes