Malicious PDF — malware analysis report

Static analysis result for SHA-256 c857ebc50bbbd294…

MALICIOUS

PDF

35.7 KB Created: 2020-08-17 01:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fec8921c33793ff55d8825fbb4ee298d SHA-1: 5d5f12e4a421c9adfd3b7c4e9b4d8a62c34a8e78 SHA-256: c857ebc50bbbd294b69a4e6fea9418719d07eb1076a33dffb5f1bc1184f9f330
194 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text referencing 'Southpaw movie free' and the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm or redirection scheme designed to distribute malware or lead to phishing sites. The primary IOC is the redirector URL.

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=southpaw+movie+free In PDF document text
    • http://files.wakefieldhockey.com/uploads/1/3/1/6/131636995/vitixalalewe.pdfIn PDF document text
    • http://gosuj.midnightcoffeeinc.com/uploads/1/3/1/4/131454057/gutefevajobemaboge.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/1/0433/3161/6923/files/kixireboroxape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/acs_biochemistry_exam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2565/2136/files/sowuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/64182884642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1702/3138/files/64800280845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/xebegobajededuvewawuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5190/0310/files/nuxatuvofirusevife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/wesavunirez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/abnormal_psychology_barlow_8th.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/fema_is_144_test_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/nubulugizitunoxex.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 2

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_off00004c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8C 5188 bytes
SHA-256: 61f628f9989868a02633a031a254c58dd53917f022e0a38a58e682713233d8e5
font_01_sfnt_off00005e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2B 10684 bytes
SHA-256: 281129ceb68eb5eda382dbd950e8ef936cc7b54cbf5bdb5ed7b54419a45abe9b

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