Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a46cf2ab550e0b…

MALICIOUS

PDF

77.4 KB Created: 2020-12-01 13:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bf0280d82c0ca50e81b36f122b6164ad SHA-1: 5361c04988998d4adb3a2b247febb947de26c3c1 SHA-256: 88a46cf2ab550e0b97d1c9dd67d9475a4f07ac5781dfcf6b56b5d01e32eadb0e
154 Risk Score

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'. ML classification and ClamAV also flagged this file as malicious. The embedded URL is likely intended to lure the user to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/strik?utm_term=google+what+is+10000+divided+by+10 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5fbd578df0a61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_5f994a677e752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_5fbc183e8743a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5fbd8ffcb3456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_5fb32e428edef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453890/normal_5fa78f1a6657d.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1701a3dfdd95b60d8e131/t/5fc4728d3c6ccf69f3ed9a9f/1606709903867/57401162977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fc1958-37a6-4d5a-9b72-34758766f2f9/97556592930.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27aecc14dfd36fefb8ed8/t/5fc5c7c94e98326c02d97cee/1606797257131/lososefusozezixifukumig.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/canton_high_school_ma.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc169f3e2fce462bc8f8ca6/t/5fc41183cb3e0f5771cf1320/1606685064674/taxepafuruxetebupas.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/73206880960.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e940bd14ff0dd29cb4d3/t/5fc1c114e18c5c478e3cc3a2/1606533396582/93327134410.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28998403f5353fda0357a/t/5fc62a4264571256540e7e11/1606822466424/onedrive_for_business_latest_version.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000d9d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD9D1 15112 bytes
SHA-256: 60d9369194f3775de0ff9cd2dcd62286c10d88b5b9bda84e34283b2b2760b43b
font_00_sfnt_off0000c6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A4 5612 bytes
SHA-256: 0b64938d7a62b71d362a874aa58b36f1f076932eaa55bc0eeedfbe5838e841f9
font_02_sfnt_off0001046f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046F 10460 bytes
SHA-256: 999982706eb447fe0dc0880a98b7a24730f4dc72d82aef1bde22c229315d7818

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