Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fd2e2865185bb0…

MALICIOUS

PDF

68.3 KB Created: 2020-10-04 02:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b0a42ef19eebf0e0ed1fd349e945d355 SHA-1: ad6c6f1864b24a4fea53a45217479a139fce4354 SHA-256: b7fd2e2865185bb095e10ee1954b93332341d417022b4e79e094218dbdf5b3a5
154 Risk Score

Malware Insights

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

The PDF document contains embedded links and text that mimic a prayer book, a common lure for SEO-based traffic manipulation. It redirects to a known malicious URL, cctraff.ru, which is likely part of a link farm designed to generate traffic or distribute malware. The ML classifier strongly indicated maliciousness, and the presence of numerous external links further supports a malicious intent.

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/strik?keyword=catholic+simple+prayer+book+pdf In PDF document text
    • http://files.ps10forthill.com/uploads/1/3/0/7/130740623/1514916.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a13085-89e5-4ffc-8599-27a2d8aefc14/gupomogamiwetogixozig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eaf64f6-0444-4531-ad3f-4378c4c95cfc/tizajeredolezutuviwizekeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed1d6ae9-8990-4bcd-90d5-94753583069b/41903191547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7523e21-db17-47d6-9623-247f4d828d34/94690063011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f571bcd8-a9ef-436a-a567-822291163681/35692773614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6523/2539/files/late_registration_zip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3738/files/modified_spotify_apk_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/5658/7929/files/dd_5e_injuries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9092/1622/files/iron_druid_chronicles_book_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/pocket_mortys_hack_apk_2.12.0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8262/0322/files/25018973913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6693/2902/files/zudunidaneburakad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7E 5608 bytes
SHA-256: ed51b46afba54969ebd4ae45973ff44654ba5bd9e55658ae4e3301b481b95976
font_01_sfnt_off0000e064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 10556 bytes
SHA-256: 63516b7076b516ac42bb465d035d6eb471cbbfa49471dd93bfd23eeed75753d0

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