Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5a37e864f585c0…

MALICIOUS

PDF

48.5 KB Created: 2020-08-22 15:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c65e9dcab2b32b659330b842983a9e13 SHA-1: 6ad0762e7012c47826da162e3f523d115d95f246 SHA-256: ef5a37e864f585c0e5ea25778c778d9b0a17911426fcf116d30535a8fb779ce6
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and contains a link farm of numerous PDF documents. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=lol+guide+morgana+support', is known to point to malicious redirector infrastructure. The document body contains garbled text but includes the same malicious URL and several benign-looking PDF links, suggesting a lure to a malicious site.

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=lol+guide+morgana+support In PDF document text
    • http://kufaf.americanawningabc.com/uploads/1/3/2/6/132681504/88c52b7a8.pdfIn PDF document text
    • http://valebur.watercolorjourney.com/uploads/1/3/0/8/130874038/liforijenusonifuj.pdfIn PDF document text
    • http://files.hemlockcanoe.com/uploads/1/3/1/4/131408280/muvijomuni_nubejurazavawup_dewojulu.pdfIn PDF document text
    • http://files.pitabilities.com/uploads/1/3/0/9/130969313/5206329.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/1/0463/4175/0945/files/administrative_officer_resume_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3164/8661/files/antropologia_fisica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4583/1324/files/jivezale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0412/5599/files/95503197285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/80998574885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/42639211037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/78173669051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2330/8712/files/57841450365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1215/3766/files/binghamton_campus_map.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 6

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_off00007213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7213 5220 bytes
SHA-256: f0550a2d55472b002f0ab0271db75488535e4848c25e0249f5f860c34cfc2510
font_01_sfnt_off000083c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C3 15700 bytes
SHA-256: 2e61ca00052d17c5b682b69fbd63c3768363b255f551538788a9af1b8f52cf2e

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