Malicious PDF — malware analysis report

Static analysis result for SHA-256 650c27f8b1409178…

MALICIOUS

PDF

40.6 KB Created: 2020-08-10 08:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea50ccaa92698835b2c0765616f9a724 SHA-1: 7328086ef860b5b4f69dc9132f0f85cc66be9fa8 SHA-256: 650c27f8b14091785ea94a7f9118c4a500b1a8d674c14cd08dd0ba247b969e41
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious due to its use of redirector links, specifically `https://ttraff.cc/pify?keyword=practical+seismic+data+analysis+pdf`, which is a known malicious redirector. The document also employs SEO link farming techniques, embedding numerous links to other PDFs, likely as a lure for users seeking free downloads. The ML classifier strongly supports the malicious verdict.

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=practical+seismic+data+analysis+pdf In PDF document text
    • http://papud.theopenbus.com/uploads/1/3/0/7/130775413/texexixusavi-tavumuf.pdfIn PDF document text
    • http://files.indoorairsolutionsga.com/uploads/1/3/1/4/131453657/2571870.pdfIn PDF document text
    • http://files.kaylahmarieartworks.net/uploads/1/3/0/9/130969925/sibora.pdfIn PDF document text
    • http://rujuma.becomingafamilydoc.ca/uploads/1/3/1/8/131856476/zukotilazu_wesinodika.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/1/0437/4809/8209/files/nigivizigavuzematifirevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/barista_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/17015938436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6244/1622/files/advocateship_mcq_model_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9850/4354/files/47773203845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7518/2496/files/latin_american_history_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/51649414793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/zebaxemewasuxidesuzen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4345/4119/files/pezalotuniwerajanolig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/57286837737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/fundamentals_of_flight_richard_s_shevell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/verizon_fios_channel_guide_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/ejercicios_clases_de_sustantivos_1_eso.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000601b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601B 5404 bytes
SHA-256: 869390df46d2c0fe6152ef8777970c8b66f2bcfcf937b36c6ccc5aaed5b07728
font_01_sfnt_off0000726a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726A 10264 bytes
SHA-256: f0d802ad59f01538f2c86b62cee25b866b659be8d45e780d07346f393c5385cc