Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a3702b588c2249…

MALICIOUS

PDF

38.7 KB Created: 2020-10-16 06:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5a0d34794a30dc1a05bce14227e223ba SHA-1: 7e243394c4b5aa215484a6dbeff96877f54970da SHA-256: 06a3702b588c224938db0f525bdc3087191eacde02750ace4c35448f3889136b
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 firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'htp indirect water heater manual' and a URL that aligns with the malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme to drive traffic 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://ggtraff.ru/123?keyword=htp+indirect+water+heater+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f890e2504e89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_5f88fb2cb0c4c.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/xijiserera.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/paberemete.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/6a3df928b9.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/f2d58d54271886.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/fc004315-e022-4011-977f-4ffe62b82883/zifibejiwusaririjemozek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b444ec9d-3ccb-4042-93fe-fef5605fbd9a/gotuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01022da0-5438-4311-9667-f4da1273a65d/11344002556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6355a77a-e5a8-479e-b94d-1be13bc12b4c/gozegovurikugitejupujef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb90055-5509-4759-8dba-2b6ee624164b/wexekimifatufujateger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be6642f-3aed-4e51-bf7e-fb24d20a0a8c/55858559031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b13722f-e692-4dd9-aa62-539fe39a1a42/xesisimaxoxokogikaronexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7228/0518/files/49461920230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/in_search_of_the_unknown_robert_chambers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6714/1017/files/78215473136.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_off0000549d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549D 5188 bytes
SHA-256: 9413251d2ef7dbc0559f91ad970c54d8c4b995d82f2085667088564e8caaf990
font_01_sfnt_off0000661c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661C 12480 bytes
SHA-256: bf4c2f34e9772c48183f83d651513360c6caa7e705cb68bd294fce07a4465d5e

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