Malicious PDF — malware analysis report

Static analysis result for SHA-256 d903ebf91e4a95d7…

MALICIOUS

PDF

43.2 KB Created: 2020-09-17 05:39:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e496360ae605ab91e42ba5b9c67d8f8f SHA-1: f5997ccd49dce0a1ce2fe37d11eb06207172a187 SHA-256: d903ebf91e4a95d70fa9770c9726b1b7b66cd63b87876a36b9485200262b3466
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=video+game+project+ideas', suggesting a lure to a malicious site. The presence of numerous PDF links further supports the attack pattern of directing users to external, potentially harmful, content.

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.link/wix?keyword=video+game+project+ideas
    • http://files.theskinthatburns.com/uploads/1/3/1/1/131164534/f66e7e2f6bf.pdf
    • http://files.gamezandmore.com/uploads/1/3/1/4/131454549/01ae8.pdf
    • https://700406d4-fde8-4470-b7f6-09abbfec2f7b.filesusr.com/ugd/b56239_42f17346d73f4b9ebd520142ad3e0f2d.pdf?index=true
    • https://cc191a37-01ff-446f-9160-0ca68af0a974.filesusr.com/ugd/baef12_ea3f2b33da5c44be99be88ebfcb82088.pdf?index=true
    • https://52dc4e84-bb7d-4db5-a693-36a723361693.filesusr.com/ugd/74e905_5676a130cd464268b54cb227cf5f5d9e.pdf?index=true
    • https://a2cd953f-35aa-43a5-9c58-7247e866a977.filesusr.com/ugd/e6092c_e7cbddc1bae44a2fa0bf58ddb32b602e.pdf?index=true
    • https://bc8e72b1-ff48-4938-badb-3b7e92d32871.filesusr.com/ugd/a91264_7318f767aec249c598b0901ec0b550f8.pdf?index=true
    • https://901662aa-a8d5-4908-a24f-21af652419c6.filesusr.com/ugd/f08e01_e163c3fce37f46b283c5367273b81db4.pdf?index=true
    • https://0d31de65-1fe7-4611-9a3c-ac1f75a4c5d9.filesusr.com/ugd/4479ed_09add9d0653146839cfebb363e162bfa.pdf?index=true
    • https://e36c244c-f45a-47b1-8302-5e523c826a23.filesusr.com/ugd/9c8fb9_f3e5740c14754c17b4a7038ab5d4e6b4.pdf?index=true
    • https://a79fcb59-c81b-4f37-a7ad-e503ad114f95.filesusr.com/ugd/65b209_ecfa023138c84ea9b16ed6ffc1c2c323.pdf?index=true
    • https://5089bdbb-27d3-4e37-9e12-85e350aec392.filesusr.com/ugd/cf9ff1_2306eaf6c7424d0d86e6958e68d2adb2.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/6558/9414/files/zobawix.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/ielts_speaking_part_2_topics_with_answers.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_off000069ff.bin
965a25227891188b89462747e75eb3199f6d829211a3d173b089f21542e915c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FF 5400 bytes
font_01_sfnt_off00007c58.bin
afb41e50071254b04dbf2f2215b7461880e6e12a75e06d40658bd681521e8fe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C58 10520 bytes

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