Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c27cace003c800…

MALICIOUS

PDF

86.2 KB Created: 2020-11-01 03:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ee11ab339582fda2563fd7d7816cb609 SHA-1: d96634e8dc08e7d9adab55a8ae2862fc3918b183 SHA-256: 97c27cace003c80094598ee1575c5dc86a429d22f6a4266aa8a73d9a7932beca
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.com/123?keyword=big+game+treestands+recall In PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/c043d85de2.pdfIn PDF document text
    • https://zafitageleg.weebly.com/uploads/1/3/4/4/134489703/jixajixabide_filikifujemofu_lixuko_banewojikulada.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/lajesiwijonelex_tigojawax_kisebig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5f98d699a5df4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0614/7235/files/13400646268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7010/9890/files/44840837681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c96990f-5500-4e0d-a7b9-37e1cb2fb151/xijedaninuvuwezulefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9117/9717/files/lekogufozovemajavogidodis.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/37722358774.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/amie_examination_form.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000968b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968B 7764 bytes
SHA-256: 5a95285a3369ae6e96b1fac0877d77a4c7aef5d9b6906ea0621cb47137ca8d34
font_01_sfnt_off0000aadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAADD 2856 bytes
SHA-256: 6a7390c9e634f7f167841a75ffa617ce3f7010ba402b4c06ad0a47e5500b6a59
font_02_sfnt_off0000b507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB507 5308 bytes
SHA-256: 565577aee8377844e91c2cbd4bce4e67a9af08fc566abd005e4170beba737f6f
font_03_sfnt_off0000c6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BC 6188 bytes
SHA-256: 415e478c02a25785a20399858663a08e6d80bb6a144845f176d1e942b6f074ae
font_04_sfnt_off0000d5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BE 3916 bytes
SHA-256: 0c9b39815c701cc87851a5f5aad4cb9d0b427add9d235227aad36ff8793d732e
font_05_sfnt_off0000e1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CE 1696 bytes
SHA-256: 4394ff678a8d67d633356d89bd74d081f4bea698fa9765b62d515d178fd5997e
font_06_sfnt_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 17736 bytes
SHA-256: dfbd781b24321622b145007b0330c8a3a325dc764cb6d2bee5dab608f6c13eaf
font_07_sfnt_off000121dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DD 16296 bytes
SHA-256: 8730190b8af57639d10199e1cd97cce500fdc69710f473efaeef5c1849e4682b
font_08_sfnt_off00013799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13799 6824 bytes
SHA-256: f7ac69873e94ab5156f79b16e6f25d8f3203a0f75100f8b993065b371be335a4

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