Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a79e22028dad64d…

MALICIOUS

PDF

44.7 KB Created: 2020-11-04 00:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 57bcb8f7cf9dfacd2452454da717215c SHA-1: 35787f2d65db745ef9d737b451bdaea0d6ae894b SHA-256: 0a79e22028dad64df141884c5a14fcb0a1c6ddef35ccbcc5815957b63abb854e
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector, specifically designed to lure users with a 'free download' pretext. The embedded URL, https://cctraff.ru/strik?keyword=producers+in+marine+biome, is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=producers+in+marine+biome In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5f956c94c9818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_5f9e370413c8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423155/normal_5fa1447aa162c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_5f8fc9b3db2cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403823/normal_5f9c3d3be8138.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://uploads.strikinglycdn.com/files/4724deaf-6c52-4219-b094-468d32a14247/what_is_bell_mobility_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b26fda10-3fb5-470f-8b89-2e6f158ed089/xujaduvabe.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/44577745177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62861b3a-ab1c-4def-bac0-4e3da1c83a32/princeton_review_ap_world_history_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2729/1048/files/wugofav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94f5a68-588d-4c13-9d52-922107035378/sbcglobal.net_email_server_settings_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7374da8-6046-49a5-86e0-e1ff3564a966/38655831875.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/zeket.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_off000064db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DB 4996 bytes
SHA-256: 35aa532bb1d9afeffe075c7fadbfc412fc0a6d8a7acba1749c70650f99394acf
font_01_sfnt_off000075a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A1 10056 bytes
SHA-256: b23a06325e16575ed7ab38a3c913ffff9245f1f440caab226b036d1e3ff7021f
font_02_sfnt_off000097fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97FB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.