Malicious PDF — malware analysis report

Static analysis result for SHA-256 810e01367ad61da1…

MALICIOUS

PDF

42.0 KB Created: 2020-11-03 10:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ba4f3e75ec221c96349dac05da43efc2 SHA-1: 4c52b3bbd7f97d08089bd4bc1400749752f4b72a SHA-256: 810e01367ad61da1b00a3265b299977a0b97425c596396efe530f1a08d15d4b8
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The embedded URL, 'https://gettraff.ru/strik?keyword=personality+traits+of+andrew+jackson', is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or redirection attack.

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://gettraff.ru/strik?keyword=personality+traits+of+andrew+jackson In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f8e09243193e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f9afd1a53cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412584/normal_5f9bcba0399b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8964fe95b8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5fa0fb1834d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f89e5913f9e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/partial_quotients_division_4th_grade_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/the_resolution_in_the_most_dangerous_game.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/80832506991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec2a189-8d27-401d-b7d3-a4ba35a08802/36092847414.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/vivitar_8_in_1_universal_remote_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/209a50e2-250c-4ee2-b183-490d27c6abc4/36058225401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/007d4ad3-6561-454f-9f69-3c9102ad58b2/79761311264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ad9603-0775-43c3-8672-30dbb2632589/jifiguten.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/hemoglobin_estimation.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_off00006534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6534 5348 bytes
SHA-256: 86df0a2681d1a91b52cae7ca389690830e2bafa7a3849085b251b55c69674d13
font_01_sfnt_off00007798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7798 10420 bytes
SHA-256: 21127c17a026275b444e715d40908f7f787e04b20e670698eab94ebf30c30bc8

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