Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e3499fd74a0982…

MALICIOUS

PDF

42.2 KB Created: 2020-08-09 20:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c8004fc95b7d0f036db6839a0c3b94b SHA-1: a8ce43f5f3a3887bd442605170bc0c4111814dbf SHA-256: 91e3499fd74a09824eef5b3a4bd95601381a8a640e7e46f2279f507eeaaff693
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary link, 'https://ttraff.com/pify?keyword=angular+tutorialspoint+pdf', is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to the same URL and other PDF links, suggesting a link farm or redirection scheme. No scripts were extracted, limiting the analysis to the document's linking behavior.

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.com/pify?keyword=angular+tutorialspoint+pdf In PDF document text
    • http://files.tatiromo.com/uploads/1/3/1/8/131859993/34d773e38c9b53.pdfIn PDF document text
    • http://files.lccyearbook.com/uploads/1/3/1/4/131483025/8627948.pdfIn PDF document text
    • http://fegek.env.careers/uploads/1/3/0/8/130874655/3ee71dab535.pdfIn PDF document text
    • http://files.bonafidemealprep.com/uploads/1/3/2/6/132695602/xijor_muriwetot_sofimugagiwi_mewujizagofob.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/1/0431/0836/8545/files/62107967366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/50908900109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8501/9801/files/python_3_string_replace.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/vedic_astrology_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/11061195381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4292/9821/files/korudemopole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8440/6181/files/79739865425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/62499721795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/1773852817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/tofimisirupirunusag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4676/8535/files/maths_worksheets_for_year_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/celebration_cinema_lansing_imax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/dadopu.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_off00006753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6753 5200 bytes
SHA-256: df1d870f057b239e40d9dfc275fd404deb818e21422c5cbb572c4de8f6644ebe
font_01_sfnt_off00007917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7917 10032 bytes
SHA-256: eb33b05aa131df91e077c05cd5b9429e76095be8cf702fca6e57796cb5f72713