Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f995cfce22a879b…

MALICIOUS

PDF

50.5 KB Created: 2020-11-01 18:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2d43a1a214a7510d89d75cd863ab6ae SHA-1: 54fe0d376c178a9eb8e8f5a16ff40b6413b54fde SHA-256: 4f995cfce22a879bef689101cfcec1c6d3e69ea7e6e1d758c412c2ba1fe860b5
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Android1.com subway surfers apk', suggesting a lure to download a game. This redirector is likely used to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=android1.com+subway+surfers+apk
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f8df4a52a637.pdf
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f87a86ea631d.pdf
    • https://cdn-cms.f-static.net/uploads/4417992/normal_5f9a27841f60b.pdf
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5f9a407f8e52a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0505/1429/7032/files/66093968061.pdf
    • https://cdn.shopify.com/s/files/1/0434/1651/8805/files/80349091213.pdf
    • https://cdn.shopify.com/s/files/1/0266/7947/6403/files/14027994258.pdf
    • https://uploads.strikinglycdn.com/files/72237bec-470f-41a8-bf41-6854b37f998d/mitos_de_mexico_prehispanico.pdf
    • https://cdn.shopify.com/s/files/1/0266/7885/3812/files/royal_icing_with_cream_of_tartar_for_gingerbread_houses.pdf
    • https://cdn.shopify.com/s/files/1/0501/2337/4785/files/advanced_bionics_cochlear.pdf
    • https://cdn.shopify.com/s/files/1/0503/0019/0917/files/theoria_apophasis_book.pdf
    • https://uploads.strikinglycdn.com/files/da733400-f81c-42c4-97e7-124ccb673ad2/9458466319.pdf
    • https://uploads.strikinglycdn.com/files/23ffd063-6ab2-4cb2-9290-6c8f2629cd53/2360053605.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/32416012487.pdf
    • https://s3.amazonaws.com/susopuzupure/wisusozu.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006965.bin
c20d767b033d717623fe3adb3ef5093158c836e71a66c4c0dc7aecba2cc6de73
pdf-font-stream PDF embedded font (sfnt) at offset 0x6965 5740 bytes
font_01_sfnt_off00007cfe.bin
2ee143f290d405ae608079830acf37663efc1a81f24bd57a7cbc41eb0aa3620f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFE 10844 bytes
font_02_sfnt_off0000a1d5.bin
977f74feaa223efdb1d9ad3943850d8c50b74bcad4c78a34edea7b3461c29301
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D5 17600 bytes