Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61b582970823045…

MALICIOUS

PDF

41.2 KB Created: 2020-10-20 12:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2f338400be89e07e35d8fedd36984396 SHA-1: 540b27df5e0502e1181f8d5cc23850f067763318 SHA-256: a61b582970823045913923b64e4db9d78100d8ff049bc70956423881768304c1
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/pify?keyword=introdu%25C3%25A7%25C3%25A3o+a+epidemiologia+rouquayrol+pdf'. This URL is flagged as malicious and is likely used to lure users to a phishing site or download further malware. The ML classifier also strongly indicated maliciousness.

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://cctraff.ru/pify?keyword=introdu%25C3%25A7%25C3%25A3o+a+epidemiologia+rouquayrol+pdf In PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/3503281.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/rexezigiwer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f87433131678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f8e1e77498cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5f8d3cb0eed51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f8710df2622c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f88f647b94b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8b1e3d59fd0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/lanatexiwij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4627/5752/files/92566290160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0308/3928/files/dr._heinrich_germany_weight_loss_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d1feeb-e7bb-4b84-90c4-e20d640b07ba/nenemaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afb61441-86d1-4916-96c3-bc17f031c60c/navazusorigitatalasuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f725dcb1-d234-40ad-8f7b-e72779c32d3e/introductory_statistics_w_mystatlab_access_code_edition_10th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7bd730-cc2a-4c06-9d82-ba69da2fc56d/sesopodivejuso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F1F 5728 bytes
SHA-256: b2352178486328d6044d7a87c195602112129cbd806b00e9d6aa52461ccc2805
font_01_sfnt_off000061eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EB 12448 bytes
SHA-256: bc3673ed1fd23770b08da23338e3f5d6857d04b212850f8ee721972d0e9c01e7
font_02_sfnt_off00008756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8756 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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