Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39f79c2c001db6f…

MALICIOUS

PDF

52.8 KB Created: 2020-10-21 05:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fb0330d62805bde8cf2619dd59c1f5df SHA-1: 646a585352f383b49a607608f9b31113b745aa8e SHA-256: f39f79c2c001db6f92b4bd6f13c8d736212df2adfa9f657ebc51d76e49ae62f8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a download for 'globe at home mod apk', which is a social engineering lure to trick users into clicking. The document also hosts a large number of external PDF links, many of which are benign, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, but the presence of a malicious redirector and the social engineering lure strongly indicate a phishing or malware distribution attempt.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/123?keyword=globe+at+home+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8c9a7db95f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f8f25245b3d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_5f8f96b5e0699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_5f8aa9e538c6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f8f87c4eaba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f89b0e371610.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/69012694846.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/savinakepot.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/printable_monthly_calendar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8233/4883/files/best_murdered_out_cars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1422/5559/files/mokikerazivajewumesalerap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9297/5011/files/91448775737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7628/1021/files/8052228618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2992/9377/files/sivirap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6422/1077/files/labedutarub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/angel_investor_contract_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/keweju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8650/1806/files/conjunctions_worksheets_for_class_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9508/0135/files/80493143873.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/vobutobevujezufakepag.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/appellate_jurisdiction_of_supreme_court_of_india.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/samsung_android_mobile_codes_list.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_off00006ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF7 5160 bytes
SHA-256: ca5f41380422774ecfc630211a0d4bdb6c3ab538a653cbb86d5791575d486430
font_01_sfnt_off0000815b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815B 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000089e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E8 10308 bytes
SHA-256: 76d06fbdd9c8ac422d3f5da0a6c0b198cfe01ba224a7a936aa474c0f0f8e9765
font_03_sfnt_off0000ad65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD65 16696 bytes
SHA-256: ea782be8b00e7f49c8daf6764bf0c81f063c56ed28e07d3f01a3d564d186714e