Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad36c3869cec2e4…

MALICIOUS

PDF

62.6 KB Created: 2020-08-31 04:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7128bd38600062ab07f62da3f4740f2b SHA-1: 826bc886c254585266cac9b84d27d7296b1a11b4 SHA-256: 6ad36c3869cec2e412060f53d362796336d29451bff61f2573957188966ae773
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one to a known malicious redirector at 'https://ttraff.cc/wix?keyword=i+the+undersigned'. The document body and embedded links suggest a lure to download further content, likely malicious. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a malicious intent to lead the user to harmful infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.cc/wix?keyword=i+the+undersigned In 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/1/0433/4583/8248/files/villawood_detention_centre_visitor_booking_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1241/5911/files/nerizegigewulat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/87988519952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7869/7631/files/ariens_snowblower_manual.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/451461_16e4102470e846b89b468212c56054f0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b88e3d_aa781d25258e43079077a1c2086cc5d0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6428/7651/files/jozikejarepoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/dobupo.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FFC 23008 bytes
SHA-256: 5eb0f279cb9ff44b1a711bf76ffe352759d3435f3cfeba090735ad7805c776df
font_01_sfnt_off00009728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 4552 bytes
SHA-256: 0fe29c2c8f1555d49e05a3413b0f9cecc0a23c1ddc18a589abf3c9320d19a65c
font_02_sfnt_off0000a687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA687 10612 bytes
SHA-256: cf72895d91ff519a5a88cea9e8f64aa9e7182475b82e006b8fc11d6faedd91a4
font_03_sfnt_off0000cb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB03 16060 bytes
SHA-256: 4c0a3f0893f5e69c6acf0c6b7f036872587aec6188c41bdd40a009ab43c82216
font_04_sfnt_off0000df94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF94 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361