Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff96b05698e6744…

MALICIOUS

PDF

59.0 KB Created: 2020-11-01 12:27:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c3193ada425dbdb219228feeb391e94a SHA-1: d90733adc72b1f4749e0867948543cad56d99669 SHA-256: 6ff96b05698e67445c3848d1b551b2afe8fe67bff061de78154e1484723eae30
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/strik?keyword=free+samsung+tv+service+manuals+download In PDF document text
    • https://wimixexaselu.weebly.com/uploads/1/3/4/3/134324609/8240744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f9e34684c3d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447263/normal_5f9de197d7e8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5f9c5f5d87b50.pdfIn PDF document text
    • https://mebogizudoredo.weebly.com/uploads/1/3/4/4/134472702/vewab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4387/9594/files/18974121578.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/ive_been_so_many_places_in_my_life_and_time_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/creedence_clearwater_revival_hey_tonight_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2921/5390/files/12671087882.pdfIn PDF document text
    • https://s3.amazonaws.com/timafatafej/virginia_tech_scholarships_for_out_of_state_students.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/24860870836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/clonal_evolution_in_cancer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7252/8799/files/alibi_channel_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/dadetosojejujofulodez.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/56359957577.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000994f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994F 5248 bytes
SHA-256: 2d7df3fc299bd9bc766df4650801a372c4a0b02bcbc3220da8c1619d857f50b9
font_01_sfnt_off0000ab22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB22 11004 bytes
SHA-256: a0447b17e265b0781d709a73bdf75dac8c9c770a061bfbe2174f01cde7173184
font_02_sfnt_off0000d093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD093 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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