Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c422219820f3b32…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 20:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d839419372b458436387c3e7a5eaaf4 SHA-1: 8836cbd1bfc4bfa8227a85cb5ec5f378485490e7 SHA-256: 6c422219820f3b32a2914155b95ea0f9927d701eb1ffb97acc7f8fa3acac2bc3
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirectors or potentially malicious domains. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a link farm designed to redirect users. The document body contains text related to 'Xmanager for ubuntu', likely a lure to entice clicks on the embedded links.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=xmanager++for+ubuntu In PDF document text
    • http://zexitugap.ourlordstemple.org/uploads/1/3/1/0/131070487/kuvati-ruwavijuloj-polezofilumeg-padubodetemali.pdfIn PDF document text
    • http://files.suffolkjuniorchess.org/uploads/1/3/0/8/130874566/e0e3238332.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/1/0433/0687/7080/files/pamuzinesikajojefex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/5999911518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/40962726666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6522/1015/files/dagagupazomuropuzog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/contract_bidding_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9652/1369/files/ios_10._2_public_beta_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/mafugaredodojajob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/koduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4798/5053/files/managing_oneself_peter_drucker_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/liwobugidojubid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/23153757917.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
🗂 Part of campaign: suffolkjuniorchess.org 4 samples

Related samples 3

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_off00006aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAF 4996 bytes
SHA-256: 7d8ae3df41fe25d5430098258f6fe50a46fe168faab5738092462dbc250d31b5
font_01_sfnt_off00007b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B94 10788 bytes
SHA-256: e43f8b089d49e8d02094fb1fd80f8e7adcdecd82187b1514c00642a086426ff3

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