Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab22a8d8072361a…

MALICIOUS

PDF

42.2 KB Created: 2020-10-07 05:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17e853a944eb888cbb80529907e8120c SHA-1: febcfc6ba1f25ec3e1ae5e41f8d71e29ee20b6a9 SHA-256: aab22a8d8072361a904165d4713b53ea579f1dda617561095dfe13ed8671d29b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'foxit pdf redaction tool', suggesting a phishing or scam attempt. The presence of many external links, including to potentially malicious infrastructure, indicates an effort to redirect users to harmful 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://gettraff.ru/strik?keyword=foxit+pdf+redaction+tool In PDF document text
    • http://siwipite.fremontbands.com/uploads/1/3/1/6/131636727/8363894.pdfIn PDF document text
    • http://files.leroyvfw.com/uploads/1/3/0/7/130739489/bilexemis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/083cedcd-50b4-4eae-895f-ba770f33fc51/kamixopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd946aa9-0b35-449e-8ed7-4b11f966b1df/suwikomilunizuzemejeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d57789d-6f58-453c-b2f1-0bddafbf6618/jazebagepufew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a767cb2-61e6-4cfb-9073-71d87b7f4654/19638942439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4cba34-5711-41ce-89ed-9a0824fb282a/rudigamivutidifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529f9fe5-fd36-496d-9321-e796d655f9f4/25155566624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d928c1-be33-4417-9f0b-af83e2e57e18/61534483105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce69bcc6-0159-4e2f-9fba-ff9df7a16498/98269786061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8dc4ac1-dc69-4b3d-b0df-08bf7d549fa8/rosasavigakimanunuzaguz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2726/files/43323397207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3193/2311/files/final_fantasy_8_rom_disc_4.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF3 4784 bytes
SHA-256: 64a0b4e64c01bd61fe947c2e9cba1d7371133c3a4cb118449d50b2214b8bb7c4
font_01_sfnt_off00006c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C43 9976 bytes
SHA-256: 172363dc24c76a89cb904b32ef36172aae8b908d921f73910eb424b5a398acdf
font_02_sfnt_off00008e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E59 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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