Malicious PDF — malware analysis report

Static analysis result for SHA-256 427f80ba15bc3fbf…

MALICIOUS

PDF

67.3 KB Created: 2020-11-27 10:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 02a37461d6f784f355cf054b8f88804f SHA-1: 1d1eb3dbadcbeed2f82f037dab1e4d17beb946d8 SHA-256: 427f80ba15bc3fbf16cbc2d2a063eed6d39bea89a1fc6469bdefeb37e6df973d
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, including one pointing to a known malicious redirector infrastructure at 'ggtraff.ru', suggesting a phishing or malware distribution campaign. The presence of many PDF links also indicates a link farm, often used to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=windows+8.1+build+9600+download In PDF document text
    • https://nopiroradonumiw.weebly.com/uploads/1/3/4/4/134401961/17bbbad1c.pdfIn PDF document text
    • https://tuvitewolejuxow.weebly.com/uploads/1/3/4/6/134615754/4584444.pdfIn PDF document text
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/1857dbcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5fa69e582be9b.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/sozupaguvasalisufo.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://fejigurize.weebly.com/uploads/1/3/4/5/134509658/kexezosugura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5fb7bb121e153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_5fb7a0cb74150.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/97878.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/bopoka-dawemimuz-towadidam.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/negonanopix/12980653228.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/13315963385.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/7640446945.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/45644351900.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_off0000ca90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA90 5700 bytes
SHA-256: 1d19bf092bcc81380321aea2326c2564c8c2ebb1939dd6a574bc0293bbbbdb26
font_01_sfnt_off0000de24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE24 10148 bytes
SHA-256: 8f355eb5e37966e2657d1a489ddf2227516f800f1208697519350b4e5797aca9

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