Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b9904b20e62414…

MALICIOUS

PDF

49.5 KB Created: 2020-08-06 00:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd9c6e8e68943e2891d1cba157ae2f43 SHA-1: c3b83057d9960f259ca23bff3bfd2bdb631a2843 SHA-256: c4b9904b20e6241434e14a88bd3a00934c41f75df8c09f01eaca85d1b2f1843b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which likely serves as a lure to a phishing or malware distribution site. The document body itself is heavily obfuscated but contains the target URL, suggesting an attempt to disguise the malicious intent. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=astm+a106+gr+b+pdf In PDF document text
    • http://files.mxmsupport.com/uploads/1/3/1/4/131483266/4684688.pdfIn PDF document text
    • http://files.bhgs.org.uk/uploads/1/3/0/8/130814397/898654.pdfIn PDF document text
    • http://files.thewanderingbays.com/uploads/1/3/2/6/132682974/sawebivexugo.pdfIn 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/1/0432/1335/7211/files/write_protected_usb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1147/2541/files/likepejemaresus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9385/9240/files/84839914691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9664/5536/files/recording_studio_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/wubagox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7938/5756/files/sidovebejiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4184/0534/files/42043447230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/titudiziliguvako.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A4 5808 bytes
SHA-256: a389c6c4f8a3b3f8896cc8a096d2f57a11b3d5f37501e84a46d5b5fb39bfacd7
font_01_sfnt_off0000794b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794B 11408 bytes
SHA-256: 3a5d208d4df537e1c4c7ad5cdb9ec50bca9c8d0f32261d235dd2b06640bee278
font_02_sfnt_off00009f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F08 17568 bytes
SHA-256: 99d9ed9dc285878efb9a400b4d31086fb7721a0c4ef8a597a88d4c87b45b8e49

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