Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a27707b12992a9b…

MALICIOUS

PDF

42.9 KB Created: 2020-10-10 17:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bbfd20b7002666334c615ae351e850d6 SHA-1: e64e53e7ad10936561ce8806ca14f510fed21d84 SHA-256: 2a27707b12992a9be7d4b3a1055e9a2c822480c3628783f0eee87444c4740bd7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.club/pify?keyword=3.3oz+to+ml, which is likely used to obscure the final destination. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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.club/pify?keyword=3.3oz+to+ml In PDF document text
    • http://vubokel.myguillermofloresuagro.net/uploads/1/3/0/8/130813632/kumikowarar.pdfIn PDF document text
    • http://files.julielechner.net/uploads/1/3/1/3/131384401/5044660.pdfIn PDF document text
    • http://files.thecriticalthinkinginitiative.org/uploads/1/3/1/4/131409135/litazefizapu_pijawuluvujekof_buzelebib.pdfIn PDF document text
    • http://files.marthawarner.org/uploads/1/3/0/7/130776795/73abd32cbf.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/f170a96d-9942-4810-87d9-c41914087d18/wuxisawurijez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358a4130-ea1c-4786-abed-faca6af83316/naxerajufofazisozuzok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3516ca05-d976-4b0d-a8d0-170e39d575e0/85229538243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2bc4836-0313-4b40-ab1f-581c867ebfe6/19164003841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c408c3-d460-4c0c-9d14-35fc86b39090/95815608706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d07b27a0-bf55-4a2b-b18e-912cc11253b2/pomabopiwijazutevebupelun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8431fc79-313a-4e00-bd07-98e92531f617/82011142866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed41175-07cc-42ad-a641-650e68e0c950/gixigijinalaralitadez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3232/6556/files/air_mattress_bed_frame_for_camping.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/26959613077.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_off0000612a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 4500 bytes
SHA-256: 135bf634ed173e6c71938687525d85e2578e31deab55deed20154266656a9944
font_01_sfnt_off0000706e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 15364 bytes
SHA-256: bd462fb53e175748b5090327cedbc263feaf4bef359a5b3ce46a0935a64964fc

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