Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c09f0ea08e38f56…

MALICIOUS

PDF

791.1 KB Created: 2020-09-01 15:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b6bbf910f47a5e238e32d457dd7feb1b SHA-1: 8cb43fa0e22edd6d2d5145b0e5dbd5048518e288 SHA-256: 1c09f0ea08e38f566d31f19e54dc2c2fb14eaab42c83c82142a175b9669b04dd
102 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is a strong indicator of malicious intent. The heuristic 'SE_URGENCY_LURE' suggests the document uses deceptive language to encourage user interaction with the malicious link. While no scripts were extracted, the presence of a malicious URL and the ML classification strongly suggest this PDF is designed to lead users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9201

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/wix?keyword=cribriform+plate+ct+anatomy 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/1/0434/7772/9442/files/fancy_text_app_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7090/5756/files/alice_through_the_looking_glass_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5465/2821/files/lekukaziximofepejane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vixegenosevisime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5522/6773/files/jezejetonuditelux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6660/5209/files/x-force_keygen_for_all_autodesk_products_2016_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/38281904432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9627/6128/files/30217346435.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a59130_8e22f3cf61ee4816b59618a900e0210f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4d935e_5919ea31a8254656a942a05a878d8efe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c6ac46_c1274bd5d58641fe98e150955aef6fe7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fd3290_7fd88bbe213846beb0206ce6c664d9ae.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/913720_51e610e80aa9482d98af36b089abca8e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fe83c3_b504d311f85145ec94712ab8458db033.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fab79a6cf2c04f6d8e323205cf5fa476.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0df15e_7a05fc8ca6734edab00bf5e9c57881bd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5ecadc_82c0b0ed1cb545ed8166c8019edf5be1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000bee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE35 5132 bytes
SHA-256: 170a69c00d03f74a7130b6bcad4199e80f75e804715d980978d5a5173b9158ea
font_01_sfnt_off000bffa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFA1 16176 bytes
SHA-256: f895aebe6f1a255e76678d651e968c7c3a20f8e950f3ee77a5b2528a5297301d
font_02_sfnt_off000c32a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32A0 16320 bytes
SHA-256: 84d3fd258943f06f05ae19366a050048c68f2de4745d6677d383e3446f192251

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