Malicious PDF — malware analysis report

Static analysis result for SHA-256 28970a390410480c…

MALICIOUS

PDF

43.6 KB Created: 2020-10-05 10:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7ec82b3103982118f9b5a9873b6473c9 SHA-1: 74da2b9e750a4df3797378d4f0985acb46ccd614 SHA-256: 28970a390410480c67c3367ee42540737762a65d15021017a8e2a56a7cab069b
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 30 external links, many pointing to Shopify and Mozfiles domains, suggesting a SEO-based spam campaign. One critical heuristic identified a redirector link to 'gettraff.ru', which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same malicious URL, indicating an attempt to lure users to a potentially harmful site. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/strik?keyword=graphique+boite+%25C3%25A0+moustache In PDF document text
    • https://site-1039775.mozfiles.com/files/1039775/749470819.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/66575395131.pdfIn PDF document text
    • https://site-1039948.mozfiles.com/files/1039948/30805803249.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/kufuzofasugowime.pdfIn PDF document text
    • http://files.themahaffeyagency.com/uploads/1/3/0/7/130740625/9230422.pdfIn PDF document text
    • http://files.uberliciousph.com/uploads/1/3/1/3/131382126/tolizenewe_dopiw_vunedijovaj.pdfIn PDF document text
    • http://files.therecruiterjournal.com/uploads/1/3/1/4/131453130/sulomeg.pdfIn PDF document text
    • http://defaxadol.rollinakersfarm.com/uploads/1/3/1/3/131379732/wuxorarapik.pdfIn PDF document text
    • http://files.spanishforbabiesandtoddlers.com/uploads/1/3/0/7/130776649/xaxosip.pdfIn PDF document text
    • https://site-1041927.mozfiles.com/files/1041927/sabuliwomuvesivumu.pdfIn PDF document text
    • https://site-1039514.mozfiles.com/files/1039514/70372045402.pdfIn PDF document text
    • https://site-1041075.mozfiles.com/files/1041075/lewogaraxudufare.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/18609358055.pdfIn PDF document text
    • https://site-1037149.mozfiles.com/files/1037149/xevimita.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/personal_protection_devices_usa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2740/6746/files/gobijazevelevejonuwinowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7835/6644/files/tuketuvegegamodesetoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/tepuzawoka.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_off0000660c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 5672 bytes
SHA-256: 480fb642e22f72882a7ff815768e1ce498e26fbde27d633070f64be10689bd7b
font_01_sfnt_off0000789d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 12184 bytes
SHA-256: cd2b256f17bd2ba530948f12d487fa3c8cbf17934a778a827890cf3f96cf6b3b

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