Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd9815b2a120eae…

MALICIOUS

PDF

49.3 KB Created: 2020-08-01 13:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9344a0096886ddf91f8a988caf911d5b SHA-1: 65232e73c63bd313ed3fcc530edae4ea0eda862c SHA-256: 5bd9815b2a120eae48ba8f89a3362a6bbabccacc98feb32b880d22a9b615a837
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The heuristic firings indicate this PDF is part of a link farm designed to lure users through SEO tactics. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to direct users to potentially harmful external sites.

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=byte+array+to+string+golang In PDF document text
    • http://files.kahntilesupply.com/uploads/1/3/0/7/130776590/tasorusiwo.pdfIn PDF document text
    • http://files.warrencountyfoodcorps.com/uploads/1/3/2/6/132695465/jibuzitojesiso.pdfIn PDF document text
    • http://files.evansmstheatre.com/uploads/1/3/0/7/130776757/volatokuxoj.pdfIn PDF document text
    • http://files.kgsportsfoundation.org/uploads/1/3/1/4/131437418/17f1cdf1d3d.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/1/0432/6378/7170/files/62878453791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/62793365794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6490/1284/files/varutilobib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7818/0257/files/mexaletubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/51546541038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/64534573965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/xmod_for_clash_of_clans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/zojilijizezofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0108/6111/files/xabom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/38499940112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/zalib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/palokasekew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/525201655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/12561717543.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 2896 bytes
SHA-256: 32d4891461d6d9e2fccd1e6a13731fd4d183e8714b28e9d89bdc0bd6551577e9
font_01_sfnt_off00006bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD2 5004 bytes
SHA-256: 9ef67cd9804915246fdd4130f2bee1f4b6fcef0ea2f8ed2a78da610b82d19e0d
font_02_sfnt_off00007cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF0 10980 bytes
SHA-256: c4f96919ed649c73e0f2cbf396c0371f3fa6fc33f055d8a7f6dbefb05f4f88e6
font_03_sfnt_off0000a258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA258 16108 bytes
SHA-256: b592b3af5b8e445e60cf9b49e381aa827ab26bbfe006501ce10ecda5201fb3a8