Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31c83f61ae91d36…

MALICIOUS

PDF

39.6 KB Created: 2020-08-11 14:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 022dd522f9c3260e16f4bb1be264605a SHA-1: 1ff3f1ac11b56a860f47abf1a169de1afab44991 SHA-256: d31c83f61ae91d36142861c94fa8df7f3caecc107dffae28ad5b879f32f58dfc
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary malicious redirector URL being https://ttraff.ru/wb?keyword=chinese%20self%20massage%20therapy%20pdf. The ML classifier strongly flagged this PDF as malicious. The document body itself is heavily obfuscated and contains embedded URLs, suggesting a lure to external malicious content.

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.ru/wb?keyword=chinese%20self%20massage%20therapy%20pdf In PDF document text
    • http://files.ulrichpakker.com/uploads/1/3/0/7/130740591/3a3dd9f1c15f.pdfIn PDF document text
    • http://files.paigeandbrittboutique.com/uploads/1/3/0/7/130776167/rotogifelerafedijalo.pdfIn PDF document text
    • http://punalor.onegoodlife.net/uploads/1/3/1/0/131070374/tibixokopisitaj-xigepese.pdfIn PDF document text
    • http://files.reselliconz.com/uploads/1/3/1/3/131379324/2553570.pdfIn PDF document text
    • http://pivumozov.ipads4teaching.net/uploads/1/3/1/3/131380183/raxixa-kakuxiwubuwanak-lozekegutidi.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/1/0432/0028/2783/files/nujekuwuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/wexuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0378/8964/files/sexumenadepomoxubekelonex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/25793847663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/ciccarelli_psychology_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/gipaduviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/92942247807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/xatisigefekeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/ukulele_capo_chart.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

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0E 5464 bytes
SHA-256: f3692a293417485e59c8f29d3e6983b7dda27c49005adf0670656254193a59ef
font_01_sfnt_off00006e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6E 10216 bytes
SHA-256: 8058a0001b2d6d40724a38873df2ca72f39ce93c12732cd12573df209b0e34b8

Open this report in the interactive analyzer, or submit your own file for analysis.