Malicious PDF — malware analysis report

Static analysis result for SHA-256 962ed2f605792609…

MALICIOUS

PDF

49.4 KB Created: 2020-10-31 04:58:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0609ad9b8cd801b8d6035c2e1a2ff10 SHA-1: 1983f57faa28c830caea25789b3409549d3c340b SHA-256: 962ed2f605792609b31828beefc3f96adf40742432d6df5296e24c663a699923
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to serve a second-stage payload. The document body text and embedded URL suggest a lure related to downloading an application, which is a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

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.com/123?keyword=pes+2018+apk+download+offline
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5f8ccde4661a0.pdf
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/likepavakelavug-foriguvu.pdf
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f8eebacdc4a3.pdf
    • https://siwinapevaz.weebly.com/uploads/1/3/4/3/134338690/bobilofafebam.pdf
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/poxopapefaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/67245059-53b4-40fa-a03f-de84f2100a73/64695063517.pdf
    • https://uploads.strikinglycdn.com/files/fbe5f95f-964c-4481-9425-f4dba1b02edc/woxewalapu.pdf
    • https://uploads.strikinglycdn.com/files/f268da7e-8735-4f79-a5bb-2a7fc7834349/sased.pdf
    • https://uploads.strikinglycdn.com/files/fbb60f74-6271-4dfe-a541-e8d4ecd9972f/99378973816.pdf
    • https://s3.amazonaws.com/gumegulaxi/23041979951.pdf
    • https://uploads.strikinglycdn.com/files/704ebafe-33e1-45d8-bbda-3bf68cda4c48/vocabulary_multiple_choice_test.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_off0000818d.bin
56eb65d2d0978af7d57ba6ec107c30a9ce25fbb081cbeabaa2ebdb65f16b23f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 5616 bytes
font_01_sfnt_off000094e8.bin
99d5363b2f974acedcaab401bc0c41a3ee47dc0a4eb0518212e2a63d4f424452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E8 10544 bytes

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