Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd40fdfb47e38cf…

MALICIOUS

PDF

53.0 KB Created: 2020-07-31 15:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 005e211b15d28b8e95a0f1a497116c21 SHA-1: d4836358255ba855bb0182b6f928b158434cae53 SHA-256: 4cd40fdfb47e38cf8c592ea86522c96fc4ef3a1b23b1e2206ae14338e2d23807
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.cc/pify?keyword=south+bend+heavy+10, is identified as a malicious redirector. The document body is heavily obfuscated, but the presence of the malicious redirector and the link farm strongly suggests a phishing or scam attempt designed to lead the user to 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.cc/pify?keyword=south+bend+heavy+10 In PDF document text
    • http://files.browncountymuseum.org/uploads/1/3/1/4/131407511/zenejibenexoxor.pdfIn PDF document text
    • http://files.practicejoynola.com/uploads/1/3/1/3/131398461/tenuxapiweposod.pdfIn PDF document text
    • http://files.takeyourchancetravel.com/uploads/1/3/1/4/131407406/e041d3a32a2f.pdfIn PDF document text
    • http://files.drjessica.ca/uploads/1/3/2/7/132740234/9228330.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/1/0433/1978/7688/files/14108337469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/sipubitelafujamijukesas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/xakejil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/19130898990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/96087454132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/8486192537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/13331786290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/fudem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/mezolap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/96507536956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/82372081193.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 5

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_off000090c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C7 5040 bytes
SHA-256: fae6d78a67f484c1a0c6b39540e122fab0134c77395d0fe600d583834b846685
font_01_sfnt_off0000a1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E7 10756 bytes
SHA-256: 7fb2366a0b6555d71090cf2069d3c17740edf71ca18a9ffbaf3caa345fd59eb2

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