Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e72b30ff07722c…

MALICIOUS

PDF

69.5 KB Created: 2020-12-23 21:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 983d77f22eecc71b49bde57a16437524 SHA-1: 59301cd879c733b5e442c716c7f77445430e3169 SHA-256: 68e72b30ff07722c7c32c13f3bd6ef3ce13bbfa735d8a405e298a94bb6377d68
214 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ggtraff.ru', are highly suspicious and likely part of a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=shadow+plane+pathfinder+2e
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/lojejaburuko-kigobenanemo.pdf
    • https://cdn-cms.f-static.net/uploads/4421970/normal_5fd89a96d50e1.pdf
    • https://pudakivofuleges.weebly.com/uploads/1/3/4/8/134853743/jozuxowadojexi.pdf
    • https://cdn.sqhk.co/xakatikakizi/hjhkjjg/gawunok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zerejibixupav/wibeboduwuvob.pdf
    • https://s3.amazonaws.com/lizuseguwix/kerala_psc_2018_question_papers_and_answers.pdf
    • https://s3.amazonaws.com/zupenafud/49262758347.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/incident_response_template_doc.pdf
    • https://s3.amazonaws.com/xoxaneral/isometric_knee_exercises.pdf
    • https://s3.amazonaws.com/tadovu/zuvuvikugomobolo.pdf
    • https://s3.amazonaws.com/xelimewat/mejagexuvijatilu.pdf
    • https://s3.amazonaws.com/kudufigunabi/baseball_bat_dimension.pdf
    • https://s3.amazonaws.com/bepukuba/sidevodov.pdf
    • https://s3.amazonaws.com/jazofi/dabugudokesosapififeb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d356.bin
c2d5a119fc8016cb017f82235ec1f5a78c81c945a7016b864ed65e45070353b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD356 5276 bytes
font_01_sfnt_off0000e557.bin
7170af2133ec17048dfdd7fbe1201ea727b27048ec872d350499b1476dd23ef1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE557 10544 bytes