Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d6c4f668018acf…

MALICIOUS

PDF

59.9 KB Created: 2020-09-01 15:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8133143a3efb0860ea81b70426c477b8 SHA-1: 660d7498a5676f2318dec8d3361599f4c1ec5deb SHA-256: 79d6c4f668018acfd8562c381c9f4307476c2f68d4a9a1cf3b6dfb259c3297d7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to lead users to malicious sites, likely for further exploitation or phishing.

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=fancybox+image+gallery
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_2f34ff608644465497c549119ec35bbc.pdf
    • https://static.usrfiles.com/ugd/575363_80c602ce39c44677af24344c52407141.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b48bc90b04548f5aeea4302140446c2.pdf
    • https://static.usrfiles.com/ugd/73cb9e_5bb8bb2853b3486fa8aaa9db9085fa54.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6e2d46d0e454a4c8ba63f7b806c40a2.pdf
    • https://static.usrfiles.com/ugd/906e9f_0f38de1e8ee14a3191f91dc58763bd08.pdf
    • https://static.usrfiles.com/ugd/0511f5_33d027cec0db4bb28b9dbbaaabcecb25.pdf
    • https://static.usrfiles.com/ugd/9b5f63_2b9efabf8df54aed847bc3b98e9f58bc.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_00194c0a6e954f94a008f2e54ba8a35e.pdf
    • https://static.usrfiles.com/ugd/ce14f3_a2875f6cdc064f218e4ee3a5e49c9b7c.pdf
    • https://static.usrfiles.com/ugd/32acb1_66e7929152884b929964f44bb428a4f4.pdf
    • https://static.usrfiles.com/ugd/fafc38_7aca53ac6c984d35ba05fd595a41a44f.pdf
    • https://static.usrfiles.com/ugd/e2c250_60f03a5e3f494be9abd03ebff57c83b8.pdf
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/sony_android_tv_apple_tv_app.pdf
    • https://cdn.shopify.com/s/files/1/0434/3234/5765/files/avplayer_stop_ing.pdf
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/85309782000.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_off00009c88.bin
1fec84b47d67442c5f3b26f2cd64d8d4f9483294b79db5cb5d05893c8faf150c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C88 5204 bytes
font_01_sfnt_off0000ae3f.bin
5b38bc19daf8bd6be98ba399c3874e073582afa16af909562041623dca98962a
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE3F 17012 bytes