Malicious PDF — malware analysis report

Static analysis result for SHA-256 380c9f982967f5db…

MALICIOUS

PDF

33.4 KB Created: 2020-08-30 06:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccefd0c96f5c761447282a6d2adb2ef1 SHA-1: 3a71c580c782a717ef7225ae51ff66c29da71640 SHA-256: 380c9f982967f5db998a9ee36036270c8d8e05031edd03b0b7e1d5545cf0fe43
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that redirects to a malicious URL, disguised with a 'Best Buy Kaspersky download' keyword. This indicates a phishing attempt to lure users to a compromised site. The PDF also hosts a large number of external links, suggesting a link farm used for SEO manipulation or distributing malicious content. The ML classifier strongly flagged this PDF as malicious.

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=best+buy+kaspersky+download
    • https://static.usrfiles.com/ugd/451461_b30c8efcf5b6435b81feba8561ef6395.pdf
    • https://static.usrfiles.com/ugd/b8c837_a86cc98d60f048a99d863c5b6d6b8d42.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d11b6247966490d9a33fece389ace91.pdf
    • https://static.usrfiles.com/ugd/b8c837_f15f4eec0df14e40a334b110ed713dea.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8637/files/wusobusasusobuzufematob.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/45925121392.pdf
    • https://static.usrfiles.com/ugd/b8c837_2df67ebf33d145a4a7d7626fcc6d1c51.pdf
    • https://static.usrfiles.com/ugd/b8c837_20cd28342c4c4789b321a1bce7b0533a.pdf
    • https://static.usrfiles.com/ugd/b65acf_0be6a4b46ff44249940b498b9ce2423e.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b02eeaa05704768a4dc0be4137c9f2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f3dd58a1b594e688c0be56dde25ee0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_683867d6f6ab4a2c85a21c86e6755aee.pdf
    • https://static.usrfiles.com/ugd/ea2f88_fa667125e2e44c9bb29062ea9575636a.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_off00004672.bin
9d407f18a8f6ead8e027034f31f100b04f3c9413a54ff7624b3d1cdc41353a14
pdf-font-stream PDF embedded font (sfnt) at offset 0x4672 5400 bytes
font_01_sfnt_off000058f1.bin
e89ffd18786dc61af6a9cadf78c2cf2e16ff8fc1771a02f5b0ce74879f9ac534
pdf-font-stream PDF embedded font (sfnt) at offset 0x58F1 9500 bytes