Malicious PDF — malware analysis report

Static analysis result for SHA-256 8806fbb84095ca5d…

MALICIOUS

PDF

83.5 KB Created: 2020-10-28 18:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 139da03161ebb721215035f7905dc335 SHA-1: 1de0d1a2467cbfce41fdc45ebd69fb6e7a05d1a1 SHA-256: 8806fbb84095ca5d2e35c7807322809515cf694c2e2c772995ae1b1cf61c65ac
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO link farms and malicious redirection. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. No scripts were extracted from this sample.

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.
  • 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.
  • 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=physics+friction+worksheet+answers In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d57783b-b8d0-4741-b31f-481d10f8f26b/gumamigaxugepit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78a2eca-8d77-4912-a3ca-c9b9aa523900/33635196635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4456/8989/files/scalamandre_wallpaper_hanging_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f0c282-94ae-47da-838d-84aa1e72f436/ashrae_pocket_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8332/8405/files/wofajopanabekabip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e68e53b-37fe-49d5-bb8e-8217ee154f4c/goedkoop_bestelbus_kopen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebaca081-024c-444f-889f-764820d3b3f3/41663429521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4a2d93-51b0-4433-98d9-d638ad837ceb/fofirobadamebododatazuveb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2753c2f5-bfc2-4a93-b399-6ad0dacf91c9/41994820368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/go_launcher_z_old_version_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349e8503-3fa8-4438-a217-c39fce2e1771/xaliw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6985/2833/files/dd_5e_fog_cloud_combat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5226cc6b-0d49-4c69-ac1b-2db4ddcdc8bc/27717224322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f3a86c-021b-4505-8e4b-68b9994ff7c9/xidimezirodawozemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e4a8bd-3a0d-4936-ac13-433dd7803c60/memibirifek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/557ab2d4-6209-44f9-8789-efd73abedb71/5724529763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58716460-a9e3-4bae-b787-e81625245b36/zusoxukumiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb06bb1-014b-4c7b-8a3a-27890ec8dd31/50560829787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6094/4296/files/introduction_to_physical_oceanography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/texuremexibabat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2156846b-4bf8-40e2-a381-c85ab38a365f/3109723635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e71ac6-912c-47e1-a193-6959202cf034/19036856831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/45033746881.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_off00010bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC3 5196 bytes
SHA-256: 4f8f565689dfd55233a709906cc83a385ec3ecb2d7e6bacb2fe125cf13f7ba97
font_01_sfnt_off00011d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8A 10192 bytes
SHA-256: 367bbe889e7d37f8c549b0538133ac162cb0bb2b2cda943e12522702d1e97576

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