Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6463b89761e62f…

MALICIOUS

PDF

48.5 KB Created: 2020-09-20 07:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: c4daeffd454a0f164e83027e39ba9dee SHA-1: a52de738197511d873a1c4ba21508ffc3f91e54c SHA-256: 3d6463b89761e62f4bba7ce788cf56a8fc853ca6f3de148a69f8539ee58cfa96
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=face+value+worksheets In PDF document text
    • http://files.stillwatercanvas.com/uploads/1/3/1/6/131606502/6533315.pdfIn PDF document text
    • http://ripuxedax.caritas-veveyse.org/uploads/1/3/2/6/132682859/6071896c.pdfIn PDF document text
    • http://wogik.ajmade.com/uploads/1/3/2/6/132682076/2d09cad848.pdfIn PDF document text
    • http://files.tupuravida.org/uploads/1/3/1/4/131438397/7596964.pdfIn 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://cdn.shopify.com/s/files/1/0437/1428/1625/files/annual_hipaa_training_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7545/2569/files/kautilya_arthashastra_in_sanskrit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23313492251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/52803959833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/jurnal_ampas_tahu.pdfIn PDF document text
    • https://83b68845-4b70-4f58-bb1d-470d77bfcdc7.filesusr.com/ugd/cb2bed_178107b079e84672a0e40c7a5ed832b8.pdf?index=trueIn PDF document text
    • https://efdf2754-479c-4b3c-8c74-5b208a75760d.filesusr.com/ugd/ceb2e8_6ae2111d0ee64d26bb60507a2d21fc29.pdf?index=trueIn PDF document text
    • https://629eba9a-47a7-4091-8963-6f87e79820c7.filesusr.com/ugd/ea9bdf_dcb63d2bce2d4ab9942f58b5b9685224.pdf?index=trueIn PDF document text
    • https://8f257eb8-97bf-4e34-bc77-6aac7b50f0f3.filesusr.com/ugd/e42c35_9f14e803435c45b5989b5a9ac1b95789.pdf?index=trueIn PDF document text
    • https://24b722c3-ed3e-4bdf-a560-05cc79f102b1.filesusr.com/ugd/d4579c_df6aac2008824a218a8c82b6af123b95.pdf?index=trueIn PDF document text
    • https://ff2ed4bb-aa00-4bc2-9ff0-d2697aa66ce5.filesusr.com/ugd/dcc11b_7f473110edce4c54ac7f186271975c5e.pdf?index=trueIn PDF document text
    • https://d9bd8047-e7d0-4ace-bc2f-c63900d6d808.filesusr.com/ugd/bbdb65_f7726c38b7974a8ca5907fa4a91faa0f.pdf?index=trueIn PDF document text
    • https://7fcefb6a-ff52-4eac-b4d0-f09ddff2fa50.filesusr.com/ugd/cdb50c_c9c5dfbd4ba9409ba980e6bf26aacf9b.pdf?index=trueIn 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_off0000726e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726E 4788 bytes
SHA-256: 38a07e71d2621dd8e4c9fd468dda9e386a1e57100bd01b45689644e52bb4703a
font_01_sfnt_off000082df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DF 10472 bytes
SHA-256: 29daa9d6ea5384a0f28526eb489194233781db0f8fc35383fde46bc71a0faa47
font_02_sfnt_off0000a6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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