Malicious PDF — malware analysis report

Static analysis result for SHA-256 7898a41952e63f9c…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 05:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfee4ac5fa43b19ca7aee94993139abc SHA-1: 6a7fa8ab42f9d34d7fc39a54ee322ec0d51ebf88 SHA-256: 7898a41952e63f9c7a2c7e8778d6d5fbbe396c0bc04d6ef5d85da5beac9b0390
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/wix?keyword=kung+fu+hustle+full+movie+download+i, which is likely used to direct users to further malicious content. The document's structure and embedded links suggest a link farm or SEO poisoning tactic to drive traffic to malicious sites.

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=kung+fu+hustle+full+movie+download+i
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/kesaxuxinunukixeva.pdf
    • https://cdn.shopify.com/s/files/1/0467/5701/9811/files/tone_it_up_workout_plan.pdf
    • https://cdn.shopify.com/s/files/1/0437/0700/7127/files/lazivow.pdf
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/nofaxozibujuga.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/agamben_the_open_man_and_animal.pdf
    • https://static.usrfiles.com/ugd/b8c837_d81b9089030945d886ddd7c35c0b34d2.pdf
    • https://static.usrfiles.com/ugd/e2b09b_c3221ecff8cb4c1ebacf9518abddb711.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_39d0e8d8f4884b7b88c253a9a1351367.pdf
    • https://static.usrfiles.com/ugd/b8c837_00746bb3e7cd49f19d7059be2d01271d.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/annex_11_air_traffic_services.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/nukamutelarawova.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/bike_jersey_vector_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/1048/9496/files/sugutubalikiratefasubumo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/google_account_for_kids.pdf
    • https://static.usrfiles.com/ugd/b8c837_4980294a7d7a41199d75ae153248e726.pdf
    • https://static.usrfiles.com/ugd/a2e20a_62a552d9b7e046e9b798cc690ad4a11d.pdf
    • https://static.usrfiles.com/ugd/a01749_a6a5e0285d19421584526a1d79fc9694.pdf
    • https://static.usrfiles.com/ugd/b8c837_88832ff918c442568b08c5cada25cd28.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_off0000560a.bin
a80be797d09bf231daab143ebe3fd78e228b6ed919ba62e6d6f9f706493b6b4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560A 5348 bytes
font_01_sfnt_off0000682f.bin
1347d5bab773742abe4c76fc104040aab98d0eb96eb3ab54d0ec16a6ff22655a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682F 10684 bytes

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