Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0504997702b3b3…

MALICIOUS

PDF

40.7 KB Created: 2020-10-27 10:24:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d44eba22fa9b5b3033b2d2ad3f639758 SHA-1: d3097e16be84c15a5ffda8f50717b2a8e8e34b96 SHA-256: 1d0504997702b3b3f918645a452e3dd72b3ee9dfc4c33b83b6b6432c02d4aedb
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that point to a known malicious redirector, indicating an attempt to lead the user to malicious content. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'biweekly pay calendar 2015'. The presence of numerous external PDF links further supports 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=biweekly+pay+calendar+2015 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f8864eeb8523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f9242c6893e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f87f03664c96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_5f8d4e8e202c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f89f2c58a0a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f89221947b26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f87c16097b49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f87a6c2de8ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f971604d9800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_5f970f992e3ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f87cc5a15d47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_5f96bf5c04716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_5f90ddeb69300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_5f934b5043871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_5f937d4cd8210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f979f375ae27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f89a30880e35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4403/4489/files/13207468792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/24126501657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/3005/8436/files/27780522446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5595/3558/files/30604823165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15fffe88-2189-46ca-b65e-cb0d0a437195/jimedidulodapavasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84fc6cf-a0fd-4586-8676-f17a2d96f594/bemij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8da7b37-dc68-4b55-ab46-b2307102b318/dotedijodixatefiruv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1193f5-08a7-444f-8007-0efdd1dc35e2/31049150209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1942db3-1b32-4381-9925-343ad78dce31/peguzujesizupaloxegon.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_off00005ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA0 5644 bytes
SHA-256: 19657644d63ff9555ba032353c76b86789dbc73c0f45e2108709df7835ab8f0e
font_01_sfnt_off00007206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7206 10336 bytes
SHA-256: aaabd627e6212a604455cb02e98e3bf53cab29132beb529b6abd1ed5c00aea7b

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