Malicious PDF — malware analysis report

Static analysis result for SHA-256 680ff147110550cb…

MALICIOUS

PDF

50.3 KB Created: 2020-11-04 08:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d67995bbbca45e843c13b84f0f61f845 SHA-1: 2ffcd03cd2e9981354d30e45671af2b65f6e3fa7 SHA-256: 680ff147110550cb1f61eaa3d33fe64591cca8e32a51c66619fd1a68425ac188
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=astrology+for+dummies+book+pdf In PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/kavoboxivuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f91d8d242eba.pdfIn PDF document text
    • https://kibutabez.weebly.com/uploads/1/3/4/4/134438896/zosopidajup-fexet-legevabinexiro.pdfIn PDF document text
    • https://juluvolalo.weebly.com/uploads/1/3/4/4/134435755/saxexarotibuzeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5f9ff50d3943c.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/a67605cb-1c1f-4bc6-94d5-153703759372/strand_theatre_shreveport.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3fd1217-f34f-4334-abac-891bd67a9622/filelinamidawos.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/auditoria_ambiental_profepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28b805c-c5ce-4b51-b2e4-472201ccbba2/list_of_halo_4_maps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab0d1c2-db79-40db-acca-d5c7df048091/xitumijajuzabakeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8307252-37fb-49bb-8fad-94ab3d54da22/dubigikoladisak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3b486f-1d33-40f9-9d7e-869d4503818c/cans_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c677727-13fd-4c69-bba2-acc0e8758aa1/82083028718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21cb8274-7456-45be-ad2e-b275ad32ad3c/jiwunigivezesuj.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B2 5444 bytes
SHA-256: 544c7079e0330465b2621226806625f42e244bbe7eb8d220a1641c25972324c9
font_01_sfnt_off00009529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9529 13232 bytes
SHA-256: d6914d5478da9081c5deb2dc86e127415ae50411da7e85f3ff78fee8201528ce

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