Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7fb2df204ae079…

MALICIOUS

PDF

59.2 KB Created: 2020-09-06 19:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 75eb506bb4ad3a5407e6d6307717a733 SHA-1: 1b0cec0cd1fcb4414e6e7180e4f3a7267dfc4f01 SHA-256: dd7fb2df204ae079b34e5a7fa558928fcf5478d5e73457ca9e279d3afc27a0e9
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains a URL that matches the redirector, suggesting the PDF's purpose is to drive traffic to this malicious site, likely for phishing or malware delivery.

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://ttraff.me/wix?keyword=concepto+de+auditoria+de+sistema+de+informacion In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/b916f4_eba143238f104498866465378fcab6ef.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1acd69_15e60743232343da8ba5c29aa70a6f85.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5714bae28ead4cc998467ce501fe75ef.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/162fe6_430dc82d3a64451ca6b84d913d1ca91f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/866690_ac8563b1caa041a09ca589a5f8dd86dc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/108936_74e738c469a0400580f079382df2fcff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/37450205781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/28880607349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9318/8769/files/faduzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/fovugirunopejatenewike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/laboratory_diagnosis_of_ascaris_lumbricoides.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4bb103_97ee3e0faf6f477d92eeb3b15cb9436a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4c3ae3_b2b9a92edd7b4f6b802819caeddbbee2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/800b88_42d24d014304473db72f0ded8e78c7b4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ae059d_6248a82455da41c19656644d33b07f60.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4e402_dfe76cea053e41b2a6004c6f1b02c41d.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_off00009880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9880 5172 bytes
SHA-256: 521acfff2dd93278c463011b3f94c2bfb2fc501d8249180d5ac6288425975032
font_01_sfnt_off0000a9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9FA 11656 bytes
SHA-256: fa8d60bbac1de6b8f5bd1c3120b6d4d174e71fad0c10268b2c356fa353e97932
font_02_sfnt_off0000cf49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF49 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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