Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb919ec3dc9c1c76…

MALICIOUS

PDF

41.9 KB Created: 2020-10-07 06:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 92ac32ccdb63afee17bb79771273c299 SHA-1: ca3c62bcfaac5f9e948c0433f1559b1b66696f2d SHA-256: eb919ec3dc9c1c761a0fd360dcbdf0dcd61bf9a4004e1b3eceb486afd73aad84
154 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded URLs, with a heuristic identifying it as a PDF link farm. One of the primary URLs, 'https://cctraff.ru/strik?keyword=challenge+jigsaw+manual', is flagged as a known malicious redirector. The presence of numerous links suggests an attempt to lure users to malicious sites, likely for phishing or malware distribution. While no scripts were directly extracted, the nature of the embedded links and the ML classification indicate malicious intent.

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://cctraff.ru/strik?keyword=challenge+jigsaw+manual In PDF document text
    • https://site-1044020.mozfiles.com/files/1044020/16738269582.pdfIn PDF document text
    • https://site-1048557.mozfiles.com/files/1048557/nizanudor.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/45754024536.pdfIn PDF document text
    • https://site-1041388.mozfiles.com/files/1041388/duvujaxininawijepo.pdfIn PDF document text
    • https://site-1037859.mozfiles.com/files/1037859/tinegerejeb.pdfIn PDF document text
    • http://toboxokus.shcslibrary.org/uploads/1/3/0/7/130738615/gazujanabak_podopasula.pdfIn PDF document text
    • http://musuwidas.pureomyoga.net/uploads/1/3/1/3/131382982/zuripotusu.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/1/0483/5409/9349/files/norwegian_breakaway_deck_plans_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8979/8317/files/chapter_20_study_guide_for_content_mastery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3531/9702/files/seamless_bible_study_answers_session_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4219/5624/files/numeros_en_ingles_del_1_al_100_para_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6237/9940/files/young_justice_online_season_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1221/2901/files/presentation_stage_in_lesson_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/13323457806.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_off000067b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 5076 bytes
SHA-256: 10f89979141579f03c3ec2572c1d6f250c8385d4fdbe75e9a9017dd4cda00145
font_01_sfnt_off000078e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E6 9956 bytes
SHA-256: 69f16dc71c5add672e59b7ff233cb025de51c3c80c6ba38c488594f595183ac3

Open this report in the interactive analyzer, or submit your own file for analysis.