Malicious PDF — malware analysis report

Static analysis result for SHA-256 715fb14886946dd0…

MALICIOUS

PDF

70.9 KB Created: 2020-12-31 11:35:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c3e78e6bd5b52cac5b7752a9dadca24c SHA-1: c9382ec8705194596ab3f2147f46e8a067673725 SHA-256: 715fb14886946dd0c5957d8ab0dc0246953994cf9e196f75bec62336c974a761
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, directing users to potentially malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'ggtraff.ru', indicating a redirector. The ML classifier and ClamAV detection strongly support the malicious nature of this file, suggesting it's a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?utm_term=science+skills+center+high+school+ranking In PDF document text
    • https://cdn-cms.f-static.net/uploads/4449181/normal_5fa189af6d857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_5fd61cd60e9c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5fa6055a53eb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417403/normal_5fa5dbb67a156.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367299/normal_5fc46c0d6ddcd.pdfIn PDF document text
    • https://cdn.sqhk.co/gerukoso/jgtihja/modern_door_locksets.pdfIn PDF document text
    • https://cdn.sqhk.co/wafixagi/cXnbdgi/sopozukizuvo.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/wapogiwemur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_5fbf68688af08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f874ce2569fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5f9ba0e66e53d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5f972529a355b.pdfIn PDF document text
    • https://biwulijek.weebly.com/uploads/1/3/4/5/134500127/bakeviro_zibovokikajunuk_dijiwarenuko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C7 5228 bytes
SHA-256: f302a7c1e948b5a77c60a81ddb6a340cc0ff26d0e161783d55fbef6d64a70c71
font_01_sfnt_off0000e98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98E 10892 bytes
SHA-256: 8a9a45f98f0b5cb95fc5ed523d08179ebd649c8435b429bd83caee004692ae0d

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