Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5eaabde4f3ccfc…

MALICIOUS

PDF

72.6 KB Created: 2020-10-07 05:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fd94601a8c786f5ec7ead1ae94c5a64b SHA-1: d22dec2071b8e02de3b052a6aa286e797e443073 SHA-256: 1d5eaabde4f3ccfc364bb93408e507bf08adc298616a01638b32946924117be6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure and a large number of other PDFs, indicating a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting an attempt to lure users to a compromised site. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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=escala+de+riesgo+de+caidas+neuman In PDF document text
    • https://site-1038835.mozfiles.com/files/1038835/94261688076.pdfIn PDF document text
    • https://site-1041785.mozfiles.com/files/1041785/15245840422.pdfIn PDF document text
    • https://site-1038660.mozfiles.com/files/1038660/27692465903.pdfIn PDF document text
    • https://site-1048442.mozfiles.com/files/1048442/suwafuzagugi.pdfIn PDF document text
    • https://site-1040288.mozfiles.com/files/1040288/milakelalo.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/kupomujowiwekep.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0428/2574/4540/files/mozawez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/nifapifatekibetuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6203/7153/files/xetezirosaxugar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3184/9881/files/ffxiv_level_2_aetherial_wheel_stand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7273/7446/files/xufuwarovivekazudiguwava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da2f836-33ba-44a9-aa07-92f274021608/soxagat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee5b5f4-2229-410c-9672-cf00915416c7/rategilafakedazoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a262ec99-bfa3-474b-b8d3-e5ccf5a3eeaa/21776517218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d91bf4-9121-4d57-89b0-f2ead8360476/38651791623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e569c422-17f8-4500-962e-c8c9c5417a95/76056489811.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC545 2076 bytes
SHA-256: 77e3a43b68e432bde0a36de059896e0072a3654dbfa64c778f70236216d9d9a4
font_01_sfnt_off0000cf13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF13 5216 bytes
SHA-256: 7d8cdb89dd817175557e01a81e59fe8c480c0dc5b196d0dc4b7d659ef41ebf7e
font_02_sfnt_off0000e0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BC 12628 bytes
SHA-256: 9ef693339bc0503d2a3e39f76f833b3271a5975ac7665a51e13951bc191f19ae
font_03_sfnt_off0001097b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097B 16060 bytes
SHA-256: 4aac81bd39f4352cc89bf96d312da1399e70aa7a4d0f9c6cf0ec82909ac4d295

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