Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af2aa383e4a7aa0…

MALICIOUS

PDF

56.2 KB Created: 2020-10-31 02:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 6852ff098949a562b73e80b60b0a8f4e SHA-1: f22f72ea230624d1cc63055589cfc576ee81d036 SHA-256: 6af2aa383e4a7aa049ae66719b84c02f497946a27c89e8dbff4c36e7467dee12
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • 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/pify?keyword=the+pirate+bay+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413978/normal_5f970073adb87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427093/normal_5f9968a811330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413703/normal_5f9c9a65c84ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f9721c8c20f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_5f9895173d8df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_5f93412892db6.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000086a6.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000086a6.bin)
    • https://s3.amazonaws.com/subud/pikir.pdfIn PDF document text
    • https://s3.amazonaws.com/damevusom/priest_talents_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/navarre_beach_cam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3050/2312/files/dapujakal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/5337/2335/files/36740230341.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/qasida_burda_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/different_types_of_analytical_balance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9445/1387/files/used_macbook_pro_buyers_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/virebiregudinozad.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/cutting_edge_book_third_edition.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 extracted file (font_00_sfnt_off000086a6.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000bec9.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000bec9.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A6 4952 bytes
SHA-256: e72b5da51c322d09ba08b613fdaa457e42a381ab646c1403d15860e6c3fd709f
font_01_sfnt_off00009776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9776 11644 bytes
SHA-256: 5f8ca724e2be23827e10d1bce7c24f8f68fd70c5507d14dd3b356a57d04f575b
font_02_sfnt_off0000bec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC9 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2