Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9b463909c0d05d…

MALICIOUS

PDF

40.4 KB Created: 2020-10-24 15:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5f1b22c141580a18fa8286316d0c1f12 SHA-1: 544fe7a3547f0a58dac36f8615bc7da2cdf62216 SHA-256: 1b9b463909c0d05d12331ea1083b455a7c4c1ea721b4d21ef0c129756cb01920
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://gettraff.ru/123?keyword=plz+karte+deutschland+kostenlos+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f8faed4b33b3.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/7ce3b8.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/jomibinure.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/fujatebivab.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/8011908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8bc060951ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f937e173ea12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4944/9632/files/neriluruzigegazekuguwav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7453/4558/files/hexxit_mod_list_1.12.2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7488/6563/files/81341345796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3925/9286/files/east_haven_board_of_ed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8978/8572/files/99581179113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2242/4480/files/ch_digraph_worksheets_1st_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/742d9172-3798-42c4-bd58-4b4b0dc5caa2/69188342813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/445a2270-6243-46d8-9f07-7e59a3f6a302/rixikoxuvit.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_off00005cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF2 5356 bytes
SHA-256: 4d33f2b3ef739222c5882ab57afa612086c9a1150ae0686750eeb3961a753925
font_01_sfnt_off00006f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F30 11364 bytes
SHA-256: d77f78820fcbb195b663cdb6724f1b9d06f2371ee366aa1fb215219a6fa1103d

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