Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded217f3dd073d76…

MALICIOUS

PDF

42.6 KB Created: 2020-10-31 18:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ed68172d312e67b1d991b19059919779 SHA-1: 73fa96a5b661e0a0d25cbd43001a873a03412112 SHA-256: ded217f3dd073d76c07517b102996b1993830c33b83c5b5fb535291c9df2f841
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, with the primary malicious link being https://ttraff.link/123?keyword=brotherhood+of+arms+figures. The document body contains garbled text but includes the same malicious URL, suggesting an attempt to direct users to potentially harmful 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://ttraff.link/123?keyword=brotherhood+of+arms+figures In PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/5164519.pdfIn PDF document text
    • https://vutizimowunofe.weebly.com/uploads/1/3/4/3/134354130/bibinadoli-wegufofig-motafos.pdfIn PDF document text
    • https://ziwojezevuvige.weebly.com/uploads/1/3/4/5/134500989/611a892fa0.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/xiroxoxolaga-jeseranelimaw-zudaliwuruxow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widiku/ludusujenevolipopugotujof.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/tikobekijujegamekinab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/1074/9101/files/cedar_hill_isd_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0630/4162/files/uc_davis_basc_tutor.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/fogosoxetodabinasux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7778/2690/files/37751320320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/class_11_and_12_maths_formula.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_off00006a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5D 5340 bytes
SHA-256: f63d78c8a75778b8358112cfad2ee3216ddfaf30f259735c449f6ce5e2d93187
font_01_sfnt_off00007c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 9884 bytes
SHA-256: bbc052330bc2a96e0a5b2bc4c74cb287afe4a1013700c77d18cb0f9a837cdd91

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