Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa35f271437cf60a…

MALICIOUS

PDF

67.9 KB Created: 2020-12-30 03:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: eeb32fb60cbfe2b879d1aedef81e4338 SHA-1: a2af49ac76a5c5bdc4544c5661e646b333220191 SHA-256: aa35f271437cf60a944f5612c0932b53f1d67f038a8ad98d729fbdc5b7e2fae6
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://gettraff.ru/123?utm_term=way+maker+in+spanish+acordes'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier and ClamAV also strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=way+maker+in+spanish+acordes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_5f9197a7b151b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409610/normal_5fb71ffc686c1.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/eLijLEn/guidebook_for_marines_17th_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5fdbac8639e94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5fbd4e98c5cb1.pdfIn PDF document text
    • https://cdn.sqhk.co/muvasesuru/69hjj7E/deadly_detention_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444623/normal_5fa77055e8fbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460460/normal_5fe42805baa40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8165b788-2e87-42fa-87cb-dfa74fc7ee7a/darksiderg_new_server.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/15990430774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91dcfb2d-3f35-4012-acfa-53ae5a7d3db1/heidegger_what_is_metaphysics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/627a27e6-f13a-42c3-bb3a-0074c4331d13/44238385761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe33efb-8510-4a4d-9458-e37bc2b2eb86/64049184947.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_off0000cbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE5 5460 bytes
SHA-256: 323f5c1151f09ba7ecfcbe5441d8b7b8b11566708469751abe0409c94d614f13
font_01_sfnt_off0000de62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE62 10864 bytes
SHA-256: 5eeafc9156268e067c0e2b3d6225ad7888816d98f1c9867f08a7231aaecbed78

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