Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7c1bc8411aeafd…

MALICIOUS

PDF

69.9 KB Created: 2020-10-28 09:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3d292ced65e325cc31a9454c5bfda63b SHA-1: 814ca80c730f28a4c59df5c7f5a2b702f3fb87ec SHA-256: 2f7c1bc8411aeafd1284cdf4b551c8f24bdedf8f285887c5fdc088514763bb0d
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link redirects to malicious infrastructure at `https://gettraff.ru/strik?keyword=dental+assistant+quiz`. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to a 'dental assistant quiz' and the malicious URL, suggesting a lure to drive traffic to the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=dental+assistant+quiz In PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/4942579.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/zoninumu.pdfIn PDF document text
    • https://rakikamizop.weebly.com/uploads/1/3/1/4/131437254/kivizasip.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/mexip-limegenalagedi-farul-xesirelo.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/5361255.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/nijefakipo_fijesafelajesow_gumujaz.pdfIn PDF document text
    • https://kuvanipugeva.weebly.com/uploads/1/3/4/4/134445248/5952446.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://gixawixo.weebly.com/uploads/1/3/4/3/134322292/fukijalalin-pisozat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5f96d25aeac07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f944255dbaa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f8dec28980fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f913c1d21d88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f990ae343d22.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/1/0266/8252/3834/files/feminist_theory_reader_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7166/0189/files/21959473296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3936/2719/files/30469843118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7931/7676/files/14443360567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9846/4152/files/feritibuxusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45dd577a-a2d9-4e33-a7ea-1f0126615b8d/lijifuvukaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e824f0-10f5-49cd-ad9a-ae2c78240d37/gogifaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e528b99-1d95-4612-804f-54e10d4cb5bf/51044310203.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_off0000d27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27F 4756 bytes
SHA-256: 5df3b33f665075baf20601d9f5a349bbfae16bac1c4b3bb2a69a9b503fac9734
font_01_sfnt_off0000e2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C9 11440 bytes
SHA-256: 2dab94bf32360ee091b3d9d5f385152a68c12f841305302d00996a0e1b6c9c95

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