Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d91be0abdfe65c…

MALICIOUS

PDF

45.5 KB Created: 2020-10-27 10:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5b43dc475313249d447084395836b53a SHA-1: e7582c34ff3007289eaed28614c2db7d136f857a SHA-256: c0d91be0abdfe65cf183116664a085c61fb313c5b194660cfa42f3d78635d458
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/123?keyword=ideas+have+consequences+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one to 'https://s3.amazonaws.com/lejivugeleguwod/dajuxonofeti.pdf'. The ML classifier also strongly indicated maliciousness. These factors suggest the primary intent is to lure the user to a malicious external site.

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.me/123?keyword=ideas+have+consequences+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/dajuxonofeti.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/my_dream_house_paragraph.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/ansys_tutorial_for_mechanical.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/beginners_guide_to_indian_stock_market.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/multiplying_fractions_worksheets_4th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9310/7902/files/fubumononulatorupumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7976/9498/files/structure_and_function_of_flower_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4881/0676/files/lijovezola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6687/8869/files/spider_man_2_mod_apk_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/21907098144.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/jusixusunigomewurumoliza.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/jivorapawazebogumaxofit.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/adrianne_holt_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/14813005691.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/addition_and_subtraction_of_decimals_word_problems_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/4302603626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a5c4ea-c67e-44cd-91fd-2f800b2b871c/download_straight_outta_compton_albu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eeb92fd-4cbd-4601-b528-26d0422f10e3/gakimaregon.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_off000073e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E3 5236 bytes
SHA-256: bacf2eeecfacc0ad8f25a30ead5e49979d030697bef75ef00c09832f69bb31a5
font_01_sfnt_off000085b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B7 10364 bytes
SHA-256: 188d8a2d74a66036d27f1e4c68868a6c3193ce4e7254297ad36421be6d5fafa6

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