Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e550286f350906…

MALICIOUS

PDF

45.4 KB Created: 2020-10-30 03:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2b2c88540cdf56506157420aa7a93b82 SHA-1: 9f1e5d9f6d43582cd8c95e4180dc4c7db034eca9 SHA-256: 32e550286f35090609257b562a375d2b0599f25e59986416ddb4bc459271d940
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a document download. The document body, though heavily obfuscated, contains the URL that leads to the redirector. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute malicious 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://cctraff.ru/wb?keyword=rtca%20do%20254%20pdf%20download In 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://cdn.shopify.com/s/files/1/0502/4389/5496/files/24679775752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2713b425-5926-4cb1-9543-633af324963f/77550118509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7aebae0-9ea1-4eda-b809-846292e0db9b/97321855162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/9149/2536/files/anatomy_and_physiology_1_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c910372-3604-4fd1-b74d-26ee1d874249/lesuxerasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36252cce-fee5-4991-b275-ba420af4e505/blink_182_members_dead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dba7c96-76df-49fa-8a4e-087946bb1662/81655119405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9d48ac-58a2-4f4e-b350-baf1e0e5b1e7/3125596016.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/swivel_glider_recliner_with_ottoman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38aa06dc-f87c-4a15-860e-57b8630bd7e6/40329735354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349567d6-40f9-494f-8d00-a88bba5c610a/polut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c813ccac-6415-4652-a90a-5707718e8ef1/76026815480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0795/7400/files/zugomegobo.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_off00006468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 4940 bytes
SHA-256: abd894734d088e649464ec203cda4edabcaef24516d976244e5a7f1488a9982b
font_01_sfnt_off00007560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7560 11652 bytes
SHA-256: 95822830329a72bd6b5399e81c6770bb8237f951eeb5fa972926d196b8bc2ee6
font_02_sfnt_off00009ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD3 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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