Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f605e9896110b0…

MALICIOUS

PDF

43.9 KB Created: 2020-10-25 09:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 6de66fa6cef797d4cb9d821d240c6ce2 SHA-1: 4a1787d0f0746e8e5b0a7f18ad4cd3cb4dbe9689 SHA-256: c7f605e9896110b0662d9ead3656784539484ec9e9f373bb234ef7578a59a140
194 Risk Score

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.
  • 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://ttraff.club/123?keyword=transaction+codes+in+sap+basis+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f8a65991a689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390329/normal_5f8f289969a1f.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/xesigeze/acquisition_of_second_language.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/acids_bases_and_salts_ncert.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/strona_bierna_angielski_wiczenia_do_druku.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/endorser_addendum.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/acretismo_placentario.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/gujulisopakojilibe.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/understanding_human_ecology.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/wonder_book_report.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/68591405099.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/bisogelojov.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/76282205044.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/popimisivinovodadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/yes_chess_song_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8105/5390/files/slope_stability_nptel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2263/1067/files/xeligorazefowolik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2025/2846/files/facebook_lite_download_android_phone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3936/2719/files/22592661518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6796/3557/files/cross_my_heart_and_hope_to_spy_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2076/5344/files/sikapaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/rokikolenube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7451/2806/files/tubemate_apk_download_2020_version_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCC 5208 bytes
SHA-256: a54937f8a2f49afa78fb1046f8fb7001f29e69db4caf992bbb95a035f3403b9b
font_01_sfnt_off00007d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D83 10788 bytes
SHA-256: 04ca805b844024850ef4a9b9586693b4a6813014407b6c56393c731003d5eea6