Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77885dddd5a5d07…

MALICIOUS

PDF

47.5 KB Created: 2020-08-06 23:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d71cafd81fd945a92dcdc80881b7e708 SHA-1: 12eed08b88e068b27a9d389937d032e20aa16cd0 SHA-256: b77885dddd5a5d07cef714351736f83a1483f0210d1a9bbf1f0849f8bbf8a92e
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=morte+no+nilo+agatha+christie+pdf'. This indicates the document's primary purpose is to redirect users to a malicious site. Additionally, a large number of external PDF links were found, suggesting a link farm or SEO poisoning attempt. The ML classifier also 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.
  • 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=morte+no+nilo+agatha+christie+pdf In PDF document text
    • http://files.pieceofheart4life.com/uploads/1/3/1/6/131607683/litijafili_loxazo.pdfIn PDF document text
    • http://files.redangelsnetballclub.com/uploads/1/3/0/7/130738513/3422295.pdfIn PDF document text
    • http://files.rmbscenic.com/uploads/1/3/1/4/131482952/34f06793d3710e1.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/1/0428/9835/8432/files/damegadunuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/27158501227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/norevobufomamafav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3131/4077/files/wovuzogowigujirekipir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/lupefexivelomugimebopore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/nobixorijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3105/1931/files/50596831528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2598/8757/files/lafabebirasafomibeboj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/download_ableword.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4609/2445/files/monita_tahalea_memulai_kembali_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8775/files/89447605388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/18377014477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/schneider_electric_circuit_breaker_catalog.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_off000077c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C0 5424 bytes
SHA-256: 7240f4a451517ca7a197131f9d8025df3dcf6147d65b8a25f3838a641ae45738
font_01_sfnt_off00008a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A35 12276 bytes
SHA-256: 9eb353d89308ceb3abf49086176ec8bbc761a94447f05fc328cad28163612c15

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