Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f194c8a59eb05a…

MALICIOUS

PDF

39.1 KB Created: 2020-11-03 17:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3b756d5a861565672fabe0f45465f1bc SHA-1: 3a323836ae9cf02026234051337b618b00545c21 SHA-256: 02f194c8a59eb05a7b16e1a809b432d5c5aaf9bfbb0ea7baf731bdf190707c69
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains the URL 'https://ggtraff.ru/strik?keyword=dave+alexander+bio', suggesting an attempt to lure the user to a malicious site. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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://ggtraff.ru/strik?keyword=dave+alexander+bio In PDF document text
    • https://tozupetap.weebly.com/uploads/1/3/1/3/131383790/3676270.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/5c123633-0bcf-49f2-81a0-611d19e65432/roxupoxogepiratu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd7e4ff-1699-47fe-b086-84f48231ad21/39931859470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2877d92a-32d5-4950-aeca-bcd2ccc306ba/judoxezefarofinabolek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2147/5738/files/40507020785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e16540-b602-487e-a373-bb7ad7e55e1a/irregular_past_tense_verbs_worksheet_second_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/nefosonuvuluretuwati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a021914-864f-4ea5-b131-3f6811efe2d5/cookie_clicker_mod_apk_unlimited_cookies.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/craft_essence_of_ravage_health_eso.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_off00005938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5938 4908 bytes
SHA-256: d3c41c35e67f6b2bb69d64a5ea2af7f3c93ccd74410dc194552e4cb8b7e2cfec
font_01_sfnt_off00006a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A00 11488 bytes
SHA-256: a6fb9ae64fde7b1104068c0ba5b7c0b6baae7c8a48f1d7fcd2bc616aa0d45b6d