Malicious PDF — malware analysis report

Static analysis result for SHA-256 170a20dd71650c64…

MALICIOUS

PDF

51.3 KB Created: 2020-10-31 01:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d663e750937627ba3a4cecc7d41c35ac SHA-1: de99a2f826500b2eed454623c9754429091f8d79 SHA-256: 170a20dd71650c64f0a82b5efd9d3c71eb3a61f59c388e2f42de59acca6084fd
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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://cctraff.ru/pify?keyword=order+to+watch+jojo+crunchyroll In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nademopor/becoming_nigerian_by_elnathan_john.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1810/0120/files/vidmate_app_download_for_android_7.0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/7575467781.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/pathology_atlas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9351/7222/files/97623555188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f38fe29-ef0d-4478-a41c-a44a0943d917/nifaxorabemupegij.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/1044831740.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/66686195066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d7e36e-9107-46ae-a5c7-213fa4227e85/listview_header_template_wpf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/10085761085.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_off0000752e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752E 5144 bytes
SHA-256: 89a1452d46748380e3fb0d7f20e486d6dc203ee05766dd94e978bb7616fb68da
font_01_sfnt_off000086c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C3 10652 bytes
SHA-256: 195c9a66a5fd6f910a834d761bbd4b09e3b9e78e844e17fd92db04a5d57008e8
font_02_sfnt_off0000aaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA6 16292 bytes
SHA-256: 938ec6d3a5fa4b28107fcf2b6b21de4e46e589562d52fde11febda6a39f6843f

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