Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab20243cdec72f03…

MALICIOUS

PDF

47.1 KB Created: 2020-10-07 20:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c37d90aaa04e535ae2d05b285415ca0 SHA-1: 2de95e477dc3ff4f37aef69e7978f4016b344860 SHA-256: ab20243cdec72f03cc93ae55e4efdd65e4558630db74aa4cf53b5048eecc8382
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, including a critical redirector link to 'ttraff.link'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'zyia sizing chart compared to lululemon', which is then followed by the malicious URL. This indicates an attempt to trick users into visiting a malicious site, likely for phishing or to download further malware.

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=zyia+sizing+chart+compared+to+lululemon In PDF document text
    • http://files.isabelenglishcomp.com/uploads/1/3/0/9/130969381/venogifeta_nexinaleg.pdfIn PDF document text
    • http://files.thetotalcanine.net/uploads/1/3/1/4/131452976/jedima.pdfIn PDF document text
    • http://tepode.sunriseagcoop.com/uploads/1/3/0/8/130814328/zepij.pdfIn PDF document text
    • http://putimezu.churchweddingspaphos.com/uploads/1/3/1/4/131453028/4913581.pdfIn PDF document text
    • http://files.umcaccountingsociety.com/uploads/1/3/1/3/131383384/fopujojumakirodewo.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/6705995e-7436-4cd4-8c51-2e3562c88638/19848089485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35bb227b-91d1-45d4-bbd2-d663d18bfd46/96577988871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f106db8-648d-4276-bcec-a8317e61fd3e/kojopebobelofozuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f57269-a127-4e5e-82bb-18ec2272b183/zipibifamopewumogiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b58b399-2c02-4941-ba17-190387341289/9933459753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cbeb179-03b8-418e-a177-d0b58ad1289f/92314461102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8dbd395-250b-44d9-9b0c-23e04649b2f7/99306636579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7951b2b-d214-40ee-844a-7820fb9d11a9/57268698176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0734f5-fca2-457f-87b8-b0d61c72ed26/ranosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a6cfcd-0874-4dfe-b540-1ef8b950727b/24696840842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f5b3674-a496-4d03-9e3a-4bd653ca0a63/33991383464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75843682-c33b-40d5-88d5-4c9b53c79a2a/34117037342.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_off0000780f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780F 5596 bytes
SHA-256: cb0fb3e9752da4689a673cb17922014e5a4fb82d9d699402eb6177ae3055eebd
font_01_sfnt_off00008afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFA 10456 bytes
SHA-256: 67d55ae366cdba7cc61f3b73bc5e2ec6039446599efcc933e1ff2b2963f91c93

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