Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ad1123bbf7df96…

MALICIOUS

PDF

44.5 KB Created: 2020-11-01 04:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 68f2975f885f3a581e1a3b430325373a SHA-1: d7e6fc86042b29ce356f565c3c2ed2fa8aa61dd2 SHA-256: b1ad1123bbf7df96d81212ede277feb18ce6b618827b88883e3b00efae212afc
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file 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 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/strik?keyword=crabapple+tree+identification+uk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f8f6780bddf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f94d79535371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f959cfda6f28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8f17016d8b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413575/normal_5f976ff3b4bc3.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/1/0479/6796/1244/files/5465691854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62cf4362-bffe-45ac-aaab-c2b3a5552c75/26587751110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9187/6768/files/46074773879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5422/7367/files/37412918473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a057e16-d0f2-477b-88b4-605bdea2b025/45955914901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2737/3981/files/magnum_pi_episode_guide_1980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6250/4855/files/amazon_fire_hd_7_tablet_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6262/4417/files/xisogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3737/4656/files/xinexazipuxivoxatof.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_off00006f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 5080 bytes
SHA-256: 6c8656467c050645ee7d0e6b3eb89182bbf98dc64790afdefa4e06d1b7378d09
font_01_sfnt_off0000807e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807E 10636 bytes
SHA-256: 21cff331aa19814e3314b733578db3ce0e12463ed53378c5ceb24c9384aea5c0