Malicious PDF — malware analysis report

Static analysis result for SHA-256 77402c4a20157868…

MALICIOUS

PDF

53.6 KB Created: 2020-07-25 14:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c5d24e1b51bc4c9554779e70966a961 SHA-1: b84f74338a3cdacaa4e6ecc6570fc1c4e5e13305 SHA-256: 77402c4a2015786852851c5d2134c75984b2d7ee4fb27ef7e7be3c84f4c44e1c
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Credo mobile contract buyout form', indicating a phishing attempt. The ML classifier also strongly indicated maliciousness.

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=credo+mobile+contract+buyout+form In PDF document text
    • http://files.cvropeandgear.com/uploads/1/3/1/8/131871685/64d8212f7b9.pdfIn PDF document text
    • http://files.salvoselfdefense.com/uploads/1/3/1/1/131163723/5960249.pdfIn PDF document text
    • http://files.whlandscape.co.uk/uploads/1/3/1/0/131070165/lefix.pdfIn PDF document text
    • http://files.troubadourtheatrecollective.com/uploads/1/3/1/3/131398517/gineregeb_wosoxofij.pdfIn PDF document text
    • http://files.kansasturfgrassfoundation.com/uploads/1/3/2/3/132303382/kisut_lodut_jedoku.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/1/0428/0451/0887/files/15969501815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/24750538138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/80008677525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/kujatirubelugimiriruxon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/kusagebakubuzigipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/keferavodaram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/57673253570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tukesameb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9539/9325/files/zasafuputasuderokarut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8947/7278/files/muwobomatexamuvumanekujek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/zilofewerudinezotaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3199/3242/files/47203228740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9357/3284/files/82845837469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/dutosivawezejedo.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 6

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_off00009430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9430 5136 bytes
SHA-256: 1e09132670d819d78aef817d214e0ebfa9dedc4e1746a92177ba576399b46ca4
font_01_sfnt_off0000a591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA591 10320 bytes
SHA-256: d13451ae29be3bb236d8cef619f7bbdfe7e444d681b254f09b8c85704f87db77

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