Malicious PDF — malware analysis report

Static analysis result for SHA-256 954afb4f0810ecf9…

MALICIOUS

PDF

38.9 KB Created: 2020-08-04 22:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a86bb3195a93855bfb3e6113159609b7 SHA-1: 66676ef93013c8e2c56456f36bb6fd214f293e9a SHA-256: 954afb4f0810ecf964dbf55cf080591c4b240197cb4618c0cd13e2895eb1e9ed
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=ecocardiografia+fetal+pdf'. The document body, though heavily obfuscated, contains references to PDF and wkhtmltopdf, suggesting a link farm or SEO spam tactic. The presence of many benign-looking Shopify links alongside the malicious ones is a common technique to mask malicious activity.

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=ecocardiografia+fetal+pdf In PDF document text
    • http://files.firstempcommission.org/uploads/1/3/1/4/131438567/ridubokor.pdfIn PDF document text
    • http://files.ohmog.org/uploads/1/3/2/6/132681488/todire_vuwot_pelixululijolo_lufojasil.pdfIn PDF document text
    • http://files.divorcecoachingandconsulting.com/uploads/1/3/0/8/130874518/bejam-soselovorifat-tekumubobup-powidonuvewadar.pdfIn PDF document text
    • http://files.forwater.ca/uploads/1/3/1/8/131856034/7862045.pdfIn PDF document text
    • http://files.cjsprofessionalcleaning.com/uploads/1/3/0/7/130776275/mimumasek.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/1/0428/3308/4575/files/diphyllobothrium_latum_morfologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9333/4952/files/carrier_transicold_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/salil_sawarim_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/70381243982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/luraxadafuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwofomakilaxenifotet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/gulusibuwemogugiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1243/1770/files/41436660241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/tajadigopuxox.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_off00005e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E17 5104 bytes
SHA-256: 306dc75dd8f1b1dfa594447480b827bc86deee772d35c49d46749defaa43cb9c
font_01_sfnt_off00006f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F89 9300 bytes
SHA-256: 0f4752835977eab570245313e3502cc4998fed665f9f1ec1b3b50f621c7978e2

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