Malicious PDF — malware analysis report

Static analysis result for SHA-256 0027bb581f66497f…

MALICIOUS

PDF

47.7 KB Created: 2020-08-10 14:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfc41ccb1b70580589dbd9c50ea07ce6 SHA-1: c3e6938b31829209df091950294ca22e00088de1 SHA-256: 0027bb581f66497fa8f4b7fc1a139c0da86163cc4518d5cb639e6096bda12bee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=curso+de+robotica+educativa+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, some of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the malicious URL embedded within the document.

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.cc/pify?keyword=curso+de+robotica+educativa+pdf
    • http://files.bkyogapsychotherapy.com/uploads/1/3/1/8/131857315/4048075.pdf
    • http://files.hatterasgrandslam.com/uploads/1/3/0/7/130740138/7244093.pdf
    • http://files.southpacifichydroponics.com/uploads/1/3/1/3/131383949/55487a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/fozipepusurevinexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/all_formula_of_maths_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74808095599.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/cecily_amanda_m._forrell_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0454/5613/0200/files/paraphrasing_sentences_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/4886/7742/files/sunoxiwekojawajujaxuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/agile_project_management_for_dummies_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/jezaxusiguguvigunobufoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/1000_watt_audio_amplifier_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/activate_microsoft_office_2010.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/contract_sample_between_two_parties.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/bunamuguxedeso.pdf
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/fepipukavuvukanilopatatew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/35338231146.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/81360495972.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078c0.bin
c5ac05d38ee427f747e547b3dfc775a63e2cbaf65fce570b9a3cf13d7186bacc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C0 5224 bytes
font_01_sfnt_off00008a96.bin
34ec9e64cad54c6ce31dfd008cb1695dcb1fc658df369b5e9465d126dc9d445a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A96 12012 bytes

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