Malicious PDF — malware analysis report

Static analysis result for SHA-256 77cfa6db7a644d2e…

MALICIOUS

PDF

79.2 KB Created: 2021-01-25 00:25:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 33133db958478db02e1d519b2c1cd539 SHA-1: 96288ef8e9e0ea5975192cc15aa5d1d48ede5dfe SHA-256: 77cfa6db7a644d2e4e481de24fb55a031388dbce70180db949674b84664d8815
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 'traffmen.ru'. This indicates the document is designed to redirect users to a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to exploit users through redirection, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=sound+intensity+worksheet+answers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366367/normal_6000bbbbdee17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501632/normal_5fd6aabe9564e.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://s3.amazonaws.com/dukavunivifa/43179907507.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/insert_tick_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/82442728373.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/lose_yourself_instrumental.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/92566517548.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/meraruzabijis.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/website_templates_free_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/honor_band_4_running_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/dorapajofozipukavuzuzi.pdfIn PDF document text
    • http://xoviketi.epizy.com/77148493932.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/rutupifek.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/avatar_2_video.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_off0000e277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE277 5124 bytes
SHA-256: 0eed15924d6d6dc25b4d15230764f6ae69f46f1fda15855e66402d5ff4a61238
font_01_sfnt_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 14476 bytes
SHA-256: 8bccbe0483815d266f8cb3806a6273f77e225cc0351969dd4bfd2aec4927d5e8
font_02_sfnt_off0001215a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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