Malicious PDF — malware analysis report

Static analysis result for SHA-256 921731ea06bb4e58…

MALICIOUS

PDF

39.4 KB Created: 2020-09-01 02:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4df1ca5341443f79c5cb4beac642ba3 SHA-1: 893dd5c49ee312c494d0596cc39cf118fd675d76 SHA-256: 921731ea06bb4e580c6c5595f49511fcd89b7635e2017298e7a3801c26e7f81c
130 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. Another heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a 'download button' lure further supports a phishing or social engineering attack. No scripts were extracted, but the document body and heuristics strongly suggest a malicious redirection attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=batman+games+free
    • https://static.usrfiles.com/ugd/865d50_d3d8acf487ca4d81b1def3d0826a2d10.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc4811e10edb45acbd096aa9428404c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_304c82db875343c7814cc21b1dfc30bc.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/sigokujemok.pdf
    • https://cdn.shopify.com/s/files/1/0462/8126/1205/files/robowedabaparibetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2244/files/wevapenumuxeloji.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/moribipiwaros.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/43221737028.pdf
    • https://cdn.shopify.com/s/files/1/0434/9109/8790/files/collagen_structure_and_stability.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/85302400001.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/xuwalolufinakikizafonepa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/85879651006.pdf
    • https://cdn.shopify.com/s/files/1/0448/4536/7453/files/english_speaking_books_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0948/2658/files/gasobatavowenozasavebi.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_off00005b02.bin
62c3755e990e2ad83f8f00208ee8974037b51d4bfcb4c3bf6665feb6a3818de3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B02 5104 bytes
font_01_sfnt_off00006c52.bin
a576add98bac562dc98b32abdca2ceead88f0141f1f1bc93b38a495aa139ce94
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C52 10772 bytes