Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d635b62f5cf936b…

MALICIOUS

PDF

40.4 KB Created: 2020-08-12 06:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb6ecf6bda00f2ea9b9b08b2cb895f74 SHA-1: f442eda9c1a22c15377027b85cd2dee9c26b3f5c SHA-256: 7d635b62f5cf936b305ca99d50f1317812671bb345a8d151c35a61ae0c72318c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, disguised as a whistleblower complaint. The ML classifier strongly indicated maliciousness. The embedded URLs and the heuristic firings suggest this document is designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

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.cc/wb?keyword=whistleblower%20complaint%20pdf%20text In PDF document text
    • http://files.bargeadhesive.com/uploads/1/3/1/8/131856907/fabagumijow.pdfIn PDF document text
    • http://files.shenandoahpiper.com/uploads/1/3/0/7/130740183/gorusubegaj.pdfIn PDF document text
    • http://files.mspledgersclass.com/uploads/1/3/2/8/132814969/pitofatezowi_kirewogaw_pilobevelew_vobumaz.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/1/0431/3418/9734/files/zutuwozir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/gaxajitinumeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5202/2430/files/riximevakomobajetefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/xokedab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/15016108291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/j4_pro_builds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/savep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/geduwalozetasozomobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/24544598162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4311/8495/files/trumpet_tune_henry_purcell.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 7

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_off00005e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E77 5708 bytes
SHA-256: faecb23133d6bd0187fbfb986251417bd8ccc270ef812142bd85311525a2e32a
font_01_sfnt_off000071ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CA 10352 bytes
SHA-256: d3bb4d9d223d941a100419776e903b1098f291914b5cbb6e372188030b70bad8

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