Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd0743d6a9b6458…

MALICIOUS

PDF

93.8 KB Created: 2020-11-27 14:09:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0b31480dee41da6aceb9b69a3f913551 SHA-1: a8c0f5dabd079faca9e630518ef1ef02d8a1db15 SHA-256: 7dd0743d6a9b6458b41ccb0cae97a40a9f81ccb858bf717e309b3806eec0c32c
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms or redirect to known malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'traffine.ru', indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/123?utm_term=roger+family+guy In PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/pobevajonavawe.pdfIn PDF document text
    • https://sesesisemiv.weebly.com/uploads/1/3/4/7/134746737/505969.pdfIn PDF document text
    • https://bakukumi.weebly.com/uploads/1/3/4/4/134437371/zekajerixujutagezaro.pdfIn PDF document text
    • https://lazetulomobepi.weebly.com/uploads/1/3/4/3/134326787/xudaronaresazagasuv.pdfIn PDF document text
    • https://raxiruzaxulam.weebly.com/uploads/1/3/0/7/130738564/gezajaxetebeso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6cf0471-34f0-49ce-893f-ef07a1779ec2/57161979366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cda738-b38f-4d01-ac8c-d39396fb24af/fosobil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7680735e-0a34-419b-a8f2-deae6d091760/Dessins_anims_rotiques_japonais.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/cervical_stretching_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91713e99-d3d5-48b7-9c75-22a12d6f9008/1994_range_rover_lwb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1efe82-6d65-45a0-88c1-456e6854d8bf/98903855782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08cd375-17a6-44e5-a41c-49e769f67e16/bexuriwire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45f32841-743a-4ef8-8540-d3250dcc4709/gotige.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E5 5016 bytes
SHA-256: 0f7f31bf5fcf22dbf18dbb59194baee40e60dd849578e06fe2b85f940bd2e0b5
font_01_sfnt_off000131eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EB 6656 bytes
SHA-256: 9fa88db0f7f77a1cffaea929e22354d57f3d6ddb02d8433bebc0f128849daf7b
font_02_sfnt_off000143b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B2 11600 bytes
SHA-256: 8775923826318fa15348d5b741a2c2edc3bf5529873bac4ed2999be01b75f388

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