Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8ded23b5f531e5…

MALICIOUS

PDF

44.4 KB Created: 2020-10-05 07:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4f35fcca74be1cea51129f8940707c89 SHA-1: 586728a309eb5c4e42f77c3c171c52a4e3c96ef3 SHA-256: fe8ded23b5f531e501c69e2e7c586e2f2c9dc668740a2ef728fcb86053d46d34
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. One such link, 'https://ttraff.link/pify?keyword=best+survival+axe+shovel', points to known malicious infrastructure. The document body also contains this URL and references to other PDFs, suggesting a link farm or SEO spam campaign designed to redirect users to malicious 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://ttraff.link/pify?keyword=best+survival+axe+shovel In 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/7c02fca7-8cd9-49e2-ae57-696742ec3261/zinepesuwegudazomurusede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd68f225-e97d-4da9-9d1c-0b822fabbca0/37863824984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5a1ebe-f4c9-48f6-acaa-96a8acd90138/39826305858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9232f702-246d-4c9c-9090-1e0333b5aef3/28792960656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25175672-a409-47fa-b922-918965d6eb95/61181799163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ae3f57-edbd-4d4a-bcd6-dec9c4bfe09d/tuwajewepedegagor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be172ca5-11dd-4027-9ae5-82707ba5ec54/79407888577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8838/0058/files/chord_properties_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3506/4480/files/ohio_michigan_war.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6706/7554/files/wisotuxapeganegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2353/4744/files/blood_promise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5701/6732/files/palogabat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7356/4572/files/29258565807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/smog_check_manual_2013.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_off000070b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B9 4948 bytes
SHA-256: 8ca44211f5633d7d54b737d1129f11084a6fd1571030bd4a2a37812c32580a52
font_01_sfnt_off00008191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8191 10204 bytes
SHA-256: f4502abf8182f54401ab3bed27acbcae0069ac4efe22bc72b6fdba5d33a9aa5b

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