Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef16e7f02485a680…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 20:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02cf37cf454c0c6c4c0dfeffa1de91ac SHA-1: 116bffa955abde20e8ef7f89bef6d89754834c6b SHA-256: ef16e7f02485a680ace319a6a637ae262ec4d0a2e2315133e516781cef0548be
162 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=apache+tomcat++for+ubuntu+64+bit'. It also exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0430/8844/5604/files/xafamorelozizesorumonu.pdf'. The document body, though partially corrupted, contains text related to 'Apache tomcat for ubuntu 64 bit', suggesting a lure for technical users. The ML classifier strongly flagged this PDF as malicious.

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=apache+tomcat++for+ubuntu+64+bit In PDF document text
    • http://files.novaprint.com.sg/uploads/1/3/1/1/131164252/e65816824aa3c7.pdfIn PDF document text
    • http://files.niagaracentrendp.ca/uploads/1/3/1/8/131871659/xolewotizamukin.pdfIn PDF document text
    • http://files.shotarchives.com/uploads/1/3/1/3/131383247/8922855.pdfIn PDF document text
    • http://files.wattpat.co.uk/uploads/1/3/0/7/130740255/5161892.pdfIn PDF document text
    • http://:8080/manager/htmlIn PDF document text
    • http://:8080/host-manager/htmlIn 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/1/0430/8844/5604/files/xafamorelozizesorumonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/ngi_xa_l_albert_camus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6746/4085/files/varicocele_medigraphic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/artificial_intelligence_with_python_prateek_joshi_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/xavexojutexexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/bismillah_khan_shehnai_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/nelinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0779/3561/files/sixetebaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/32928569797.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_off00006539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 5416 bytes
SHA-256: 5ded4a45a056c168de5586717aa751f2e84601db08d82282209ce48c3f500a09
font_01_sfnt_off00007783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7783 16092 bytes
SHA-256: c791723fbdd2a93e4d5fcb502b9f81dcccf8c24b7c9c135b11d5054fb71b77bf

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