Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ada4e298ce32d81…

MALICIOUS

PDF

40.2 KB Created: 2020-09-09 20:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 977bab4280b8dd59618175450070d1db SHA-1: 2b1c5ba7fe090f9a83990510a17a449a5b444501 SHA-256: 4ada4e298ce32d817c2b048bba5972e463e68945469e127b03e3ac2aebe6667c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF was flagged as malicious by a classifier and contains a large number of embedded links, many pointing to external PDF files. One of these links, 'https://ttraff.com/wix?keyword=home+dream+answers', is identified as a known malicious redirector. This suggests the document is likely part of a link farm or SEO manipulation scheme, potentially leading users to malicious content or phishing sites.

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.com/wix?keyword=home+dream+answers In PDF document text
    • http://files.jankowsfilmwatch.com/uploads/1/3/0/7/130776158/fdbd541cb4b5.pdfIn PDF document text
    • http://files.blacklabelphotographythecatlins.co.nz/uploads/1/3/1/3/131383330/4c826d9.pdfIn PDF document text
    • http://files.nebraskasocialstudiescouncil.org/uploads/1/3/1/3/131379552/93c5544a24b4.pdfIn PDF document text
    • http://rubosid.maamedsmukase.com/uploads/1/3/1/1/131163667/duzeloz.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/1/0433/0687/7080/files/27039997465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedagefegumam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/pabipabefutamazizub.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b1dabf_cfb0151d6383418ea45cb7a5b19fa6c8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0a052f_15138a6c3bbb437aa48687e84979d37a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c268f7_60800a6bcca8402daf00943464d9c0b2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/47b1e8_855d0383d9da43a5a1cc1e8d9ec305ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/69b86f_01836d778c574548ad8c4fe0674c2fd7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6846fe_4e29b413c2644dfba002a7597555a054.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6812d7_f5d4dbb400e9482ca1d45f2a71dc7058.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cbe7f7_a44de3ae770e4f26938fd23aeced3880.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/843280_4d58c4b9007142558583a54139761f11.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_off00006152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 4992 bytes
SHA-256: 7e9dd089ee659b8d10859d728c9fe26a2595cc6f1f215c959d2f36d9086ac432
font_01_sfnt_off0000723c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723C 9956 bytes
SHA-256: f788fcee085fb5ae7a42f7e93670a9b74a20a80519cb5bf63f9515dc4357a760

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