Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93e1e3a3724f168…

MALICIOUS

PDF

45.8 KB Created: 2020-08-10 08:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39ba0cf5abe6e9e56ddbba3ac1d38ba6 SHA-1: 670b85fe0da810fd9f483245e37665e7090985f6 SHA-256: c93e1e3a3724f168ddb1378c7577329646a664db25f8b49ef51c3658f40070f8
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with 28 identified as part of a link farm. One of these links, 'https://ttraff.ru/pify?keyword=psicologia+que+es+pdf', is known to be a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to direct users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=psicologia+que+es+pdf In PDF document text
    • http://dajoviru.villacortahomeopath.com/uploads/1/3/0/7/130776394/1767325.pdfIn PDF document text
    • http://lowudip.mann4edu.org/uploads/1/3/1/3/131383483/df14b35d3e38371.pdfIn PDF document text
    • http://files.ronquerry.com/uploads/1/3/1/8/131856158/nufififemenazijiza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/membrane_proteins_and_their_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/75702533054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/40341599445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/32047900474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/48880363746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9887/3762/files/79974070957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/diropenevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4984/4890/files/jijotogebixomov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/afghanistan_political_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2110/5309/files/favijufukexadej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/23968013720.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6528 5052 bytes
SHA-256: 4604afa3d9bd68c2aafd93a496f78ea32c223fab59e4464575d5686b34b1eeea
font_01_sfnt_off0000764f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764F 11384 bytes
SHA-256: 2e3cf7a685586fc3cee172a3f3da2c6b2f0c9a287a7ea39a0c18115c8a491f71
font_02_sfnt_off00009b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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