Malicious PDF — malware analysis report

Static analysis result for SHA-256 4507f481509290a0…

MALICIOUS

PDF

43.6 KB Created: 2020-08-04 19:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17cb4ec6171cc52197ba78ea887c02b2 SHA-1: 7ef415b566d12359fc4b21b6707d5a819c9816ff SHA-256: 4507f481509290a0ee68918b9eb5c74f8f53330dca0e0c6602c17990d31c347e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as legitimate PDF downloads, but the primary link redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection. The document body, though heavily obfuscated, contains the initial lure text and the malicious URL, indicating a social engineering attempt to trick users into clicking the link. No scripts were extracted from this sample.

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/pify?keyword=wastewater+treatment+plant+design+pdf+download In PDF document text
    • http://files.easychordz.com/uploads/1/3/1/1/131163897/9530669.pdfIn PDF document text
    • http://files.literacycenterofharlingen.org/uploads/1/3/0/9/130968947/laxikexowaxet.pdfIn PDF document text
    • http://files.mmac.org/uploads/1/3/1/1/131164174/povaxiti-zuzovexasuwelaw.pdfIn PDF document text
    • http://files.mssciencefest.com/uploads/1/3/1/4/131407823/6374592.pdfIn PDF document text
    • http://files.brownhuntshorthairs.com/uploads/1/3/1/8/131856134/vazefabifajefitosas.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/1/0437/4413/3281/files/36170969254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/26390296427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5276/0224/files/vuxunavivusise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/pylab_istft_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/tosare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9376/0931/files/beatles_in_my_life_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/58374122197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6366/5062/files/59292716015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/94382731064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/visimuguze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6572/7384/files/84503047601.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 8

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_off00006a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A68 5468 bytes
SHA-256: f8f6c3292d7234e2acc68f8f565b2dec0441f1cb61e5ddf165a68e0c35ff4cb0
font_01_sfnt_off00007d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D02 10568 bytes
SHA-256: 86ab366b931f3599637fe4c7d5b7109138224b32f93a0593d2f9cb9a1562bd7e

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