Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d61bd7b7f2998d…

MALICIOUS

PDF

71.1 KB Created: 2020-11-18 09:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 11db01f12f55a76848461e8f221d2456 SHA-1: cf72a3da35b32d566be46181e698fc2667180bea SHA-256: e1d61bd7b7f2998df93f1bdb330c314c7b7458329c5b16f9ebd34abaf6629a70
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The primary link points to 'traffking.ru', which is flagged for malicious redirector activity. Another heuristic indicates a large number of external PDF links, suggesting a link farm or distribution mechanism. The ML classifier and ClamAV detection strongly support a malicious classification.

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://traffking.ru/strik?utm_term=mystical+words+of+power+damon+brand+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382789/normal_5f8e0c6161de3.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/5840ac8ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5f9133ebaf270.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/vimevubolupud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f9761366073a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f87357ddfa00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_5fb041d53906a.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/sugaguxagu/62038978125.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/alternator_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/kavekanejefemoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/variety_show_netflix_busted_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/business_law_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd7a046-6560-4fe5-9ee1-60a4106c5598/85461508984.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/43712570687.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/game_maker_studio_2_crack_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 5640 bytes
SHA-256: 172259ceb876b507404a249416e57c56ce332f4667dbf1dabf06185e168519bb
font_01_sfnt_off0000e258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE258 2232 bytes
SHA-256: e4fc62ad40493524cdb7d92c5a7c723e7c025f30b24943118572ba12618df054
font_02_sfnt_off0000ec68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC68 10088 bytes
SHA-256: a3c457fd20bc6b6277445cbd99584c5bfe35f5a079e54de7b643c4272792a5cf

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