Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cf96c64339549b…

MALICIOUS

PDF

68.3 KB Created: 2020-10-15 23:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5ee712365be7de5305ada0c40e1f4418 SHA-1: 7b63948347ed43fd9a08ef75e8d7c7a2c291ba33 SHA-256: 47cf96c64339549bfbd85b57d16841a41fb83267a78899f10b91185a3788e1e7
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable domains and redirector services, indicating a link farm designed for SEO manipulation or malicious redirection. The primary URL, 'https://gettraff.ru/123?keyword=human+histology+textbook+pdf', is flagged as malicious. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=human+histology+textbook+pdf In PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/8066348.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/b93596ac8598268.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/3868b021d7a585d.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/6129237.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/f271163d37fbca5.pdfIn PDF document text
    • https://rigonabex.weebly.com/uploads/1/3/1/4/131483185/50df2e7a0825.pdfIn PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/mexub.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/duwivif.pdfIn PDF document text
    • https://site-1043291.mozfiles.com/files/1043291/88176237387.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/tufiwi.pdfIn PDF document text
    • https://site-1043851.mozfiles.com/files/1043851/nopukufobubuvopur.pdfIn PDF document text
    • https://site-1037246.mozfiles.com/files/1037246/litozijeviwokebal.pdfIn PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/fepefexafi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82cc178-c77e-437a-b6e9-7d868349d48b/laruzijoref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79953a38-ffff-4565-8099-30b80924aac6/31153038233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01966b12-0706-4df0-be27-b8a4fa50709a/52976373360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b05c322-dfb2-4ac8-ad8e-0f4a58fc8a58/zabevazesunuzoxiputex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5226/7168/files/bagesapud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/jobabixixiporifurugubomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7477/3694/files/ditikaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b22c8cbc-279c-4d97-a38d-7b0f4df62844/buvevikunajunit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c979b64f-3155-4591-8753-996f7131ff54/polog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0435b6-2370-4956-9a55-ca44b4b4076e/69680394162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05daf8fa-4e2a-4637-98d3-7e22fbb40e1d/47283558647.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB630 5692 bytes
SHA-256: bb6045fe792e71fe26e1f99847d34480d8bae70dfa4f5d01a70ea252a0968f8c
font_01_sfnt_off0000c971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC971 10620 bytes
SHA-256: cf13149fa5ce65ebb333ebb666813ea44ed565c57ce5c9d15e616da4aa427917
font_02_sfnt_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 16148 bytes
SHA-256: ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0

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