Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0df9cbf6cd3c50b…

MALICIOUS

PDF

32.4 KB Created: 2020-10-25 05:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ac1175188f51ff0b0e12d023617961cd SHA-1: 089ff54cf90fe86ed9ca2b1905f4007c44e6e61b SHA-256: e0df9cbf6cd3c50b84c0b9bde4dfa00bf626982e5f9064e2af8fb4ab45e9473f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many pointing to Weebly domains, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://ggtraff.ru/wb?keyword=welch%20allyn%20cardioperfect%20spirometer%20manual', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains references to the same URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/wb?keyword=welch%20allyn%20cardioperfect%20spirometer%20manual In PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/tamegevikijovigo.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/zevegojakovonipojaz.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/maraduzimibi.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/jupumepuravaz.pdfIn PDF document text
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/7b3445ce.pdfIn PDF document text
    • https://mawajajapok.weebly.com/uploads/1/3/4/3/134353668/kipevoxos_wujikipog_wifav_rifesoweduzo.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/gerogewupag-fikupejoku-ratobolut.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/9900448.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/8651555.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/b4b3eb38b.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/zevazeba.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/4c189b183c97df.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://tusemebi.weebly.com/uploads/1/3/4/3/134316443/3498508.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/rovikibixu/agile_project_management_with_scrum_roman_pichler.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bebol.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/66220488600.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/13226541792.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/36544037337.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/ginepawikaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/bepukodejukopagat.pdfIn 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_off00004914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4914 5508 bytes
SHA-256: 78601283388267692c7fb5adc60d6d27ede74e5affc0df5967ee688cda2cfab0
font_01_sfnt_off00005bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC1 11084 bytes
SHA-256: be1fa2cff7d69c9dda0c6c0402bfb6993e9ddd030a67190108fe035be7bb2b65

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