Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df6284bb2bfc116…

MALICIOUS

PDF

71.4 KB Created: 2020-10-05 05:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cbf9c808dac5f8aa680f946224627023 SHA-1: 7d096c552fb63227d8c0387a1a359dec7ed899a8 SHA-256: 8df6284bb2bfc116590349c990972daa8bc3823be84cadfae69244bd400970c7
162 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, forming a link farm, and one of these links redirects to known malicious infrastructure. The document body, though partially corrupted, contains the URL 'https://ttraff.link/pify?keyword=student%2527s+guide+to+maxwell%2527s+equations', which is flagged as a malicious redirector. This suggests the PDF is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/pify?keyword=student%2527s+guide+to+maxwell%2527s+equations In PDF document text
    • http://pexivevab.shakespeare-garden.com/uploads/1/3/1/4/131453918/c7461de39ceb.pdfIn PDF document text
    • http://vetuga.erikastdenis.com/uploads/1/3/1/4/131453540/4232952.pdfIn PDF document text
    • http://wajiver.swingbandflorida.com/uploads/1/3/2/6/132682052/wokipenegur.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/gawapurin.pdfIn PDF document text
    • https://site-1038590.mozfiles.com/files/1038590/tipovatenetarolivozozi.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/sejumevoboli.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/1/0499/1477/3672/files/673713557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4683/6123/files/63379462214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3318/5441/files/situvijudebavadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0066/2688/files/5249087211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3322/7164/files/lidokumuranuvofetok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5189/5969/files/xuzudidole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/38541659474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0213/3667/files/28112211899.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000e35e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE35E 24908 bytes
SHA-256: 4fdab862483a8ae67412f3ede26363264067c587f6ec2aeefec72876b71c7544
font_00_sfnt_off00007c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C32 15188 bytes
SHA-256: db2f151199a1a3796c78dcba80bca39b846fea43df1d7d34e23cc71536b389fa
font_01_sfnt_off0000ac41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC41 5472 bytes
SHA-256: 8a4dbe85999b5497414bf169bd729b08d40d21d293da502e871e15af14073b60
font_02_sfnt_off0000bedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDD 10656 bytes
SHA-256: fb506172dd97cd26cc2efdffecf3459a8c80b3fd20268d555abcd5a3fe6e28c9

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