Malicious PDF — malware analysis report

Static analysis result for SHA-256 5569251a3312e22b…

MALICIOUS

PDF

66.9 KB Created: 2020-11-02 10:25:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 84a691bbd93b98c2e4a1d1d478d7da5f SHA-1: d4793932facaaccd1e52c70d063f57de8e1d4c46 SHA-256: 5569251a3312e22bc7cf38ed9d8f1421d9a64136c26731a0845c083503b6fda5
154 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, specifically a URL designed to lure users with a search query. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting an attempt to disguise the malicious intent. The presence of numerous external PDF links further indicates 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://cctraff.ru/strik?keyword=mega+man+x2+ost In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_5f9a4a022bd52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5f8e606c88552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f9bad5fe7ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f936f5e6c110.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/4cbeab62-4b47-4bf7-a400-ddaf1bf6708c/honda_helix_service_manual_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6729/9782/files/faxonidimanefapapanifap.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/head_start_block_grant.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/xagadujik.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/e_network_tv_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ace55a0-9760-4fe5-bbe9-e0203d25d3fc/78019887648.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/vubapununevumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4528ff-2217-48e5-9e9b-708c5545e5aa/wowowilitajaxotet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A8 5284 bytes
SHA-256: 14d44024077b374f00221624f840ff8db196cfd3169d95526d3225a78fdb48a7
font_01_sfnt_off0000a70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA70B 5084 bytes
SHA-256: 976aedc6704fecc2860d3f44a25bc508a61056f4b460f33f2c617996be9925f6
font_02_sfnt_off0000b85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB85F 14676 bytes
SHA-256: 7ae25d8f8f5534af2d0c306fba87e0324aefd793f75c96941bf00998bf0823de
font_03_sfnt_off0000e81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81B 16384 bytes
SHA-256: 080a40476460c6b22f5e5b9b46dc5bc889a3b067fc5e4aa08c4549b566ac8c8b

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