Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b62a57210b05bfe…

MALICIOUS

PDF

72.9 KB Created: 2020-09-16 14:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33501ddfde32465f0ee172f26d3e4158 SHA-1: 6fd3fae2dd4e62c52de4aa770f2299b1bf2440c7 SHA-256: 0b62a57210b05bfe9d2a7ae21361b48a4635df34d937bcd2dd66915abaacbf35
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors or link farms. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

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=boston+massacre+timeline+dates
    • http://mixewotu.swingstocktraders.com/uploads/1/3/0/8/130814397/9845127.pdf
    • http://files.lucillescatering.com/uploads/1/3/2/6/132695629/2fcae8a787eda95.pdf
    • http://lolizox.farmhousebarkerytreats.com/uploads/1/3/0/7/130775350/jusovepuxefi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://6922e5ac-82c3-45ff-a13d-83f5dc0bbe0a.filesusr.com/ugd/6f5f23_de6e5bd052e7474dae62f7db0b3f4d27.pdf?index=true
    • https://e299cd96-f5fa-4e4d-b8e8-22454be6cfe7.filesusr.com/ugd/f08e01_679e309ffc6a4bc384e90ec11d4089a6.pdf?index=true
    • https://f771c8e5-78c2-4349-a159-86a19c6f7e1a.filesusr.com/ugd/135178_e5f4d1729b874f89a17d96f5d8ed97eb.pdf?index=true
    • https://527431ad-bed0-48bd-9d00-2eadf31cf4a2.filesusr.com/ugd/0582e0_2f96afcf6e564c3e8a79cd47b484936e.pdf?index=true
    • https://c0903427-f304-4c9c-b2b7-94f813482dce.filesusr.com/ugd/f65518_5cb060d59bec40efa3ded191ea755c23.pdf?index=true
    • https://7506d60d-6861-4a97-b74a-53df23f2bf42.filesusr.com/ugd/3eb4bd_e24969044667485ebbd26fa1139f025e.pdf?index=true
    • https://d7b74d47-25e6-40c3-bfdf-7716f32181f6.filesusr.com/ugd/d5415a_d2b718882fd54814a1f82653d860a253.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/dakigenilazigepupamodod.pdf
    • https://cdn.shopify.com/s/files/1/0463/1327/5554/files/short_reading_comprehension_test_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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c988.bin
a7676e3a4102f92da02ddcaabfef27ffdc031512c8b14c26ed715705ca587411		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC988 4920 bytes
font_01_sfnt_off0000da12.bin
45cf05f4c0c84333dfb063ee54f9febd851cb1faca0556c175806eebf1a8f1d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA12 15192 bytes
font_02_sfnt_off000108b4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B4 4324 bytes

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