Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc073fbf028c67a2…

MALICIOUS

PDF

74.1 KB Created: 2021-01-09 23:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f788f8373a776096f9031868d523407d SHA-1: da0cfccd02c2b4029e7d3155a50a3a2cd226e4f8 SHA-256: cc073fbf028c67a2c1b964389c1214a768f06234e66bc44e53e59520459ba604
96 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to direct users to potentially harmful websites. The presence of an external URI pointing to 'trafftec.ru' further supports this. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely attempt to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?utm_term=asphalt+8+hack++iphone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471941/normal_5fad25abb43c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377407/normal_5ff6052a62fcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495042/normal_5fd671da4a89f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389127/normal_5fcc4a33e0280.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/3c19c316f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488103/normal_5ff0c6cd258e1.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/mexavofezoxi/axis_direct_demo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/72485737716.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/sql_server_management_studio_auto_format_sql.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/rugogigoritewubixibato.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/how_to_leave_a_party_in_hypixel_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/beastmen_warhammer_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/sweet_child_images.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD877 2972 bytes
SHA-256: a54b7893a90eb529da7229f7562a5dd47fff2e342442ef4ad71424d977b65b68
font_01_sfnt_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 5172 bytes
SHA-256: 5a78c3573b111f927cdc64d0522cd6dd2628aeb149102dc0875151f2cbe15df2
font_02_sfnt_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 12296 bytes
SHA-256: b869131f1b7715b35fbfe03b8efbf8c3c65f75fcd695c7c8aad80d8ad8a08394

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