Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ba17191936c98d…

MALICIOUS

PDF

71.0 KB Created: 2020-08-04 10:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7ba9a412340fdc2a53b1b771dc9a8bf SHA-1: 18a359aaf678a2e6f16ef70a2b602017f800ab82 SHA-256: 82ba17191936c98d15a5540b1cad64a7ef6457bd23424222f0d8275451e5778e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.com/pify?keyword=bella+y+bestia+libro+pdf. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links, suggesting a phishing or scam attempt disguised as a free book download. 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.com/pify?keyword=bella+y+bestia+libro+pdf In PDF document text
    • http://files.youngchaelee.com/uploads/1/3/0/7/130775666/e091758ee.pdfIn PDF document text
    • http://files.sharonjriley.com/uploads/1/3/1/0/131070327/4367628.pdfIn PDF document text
    • http://files.rbsknowledge.com/uploads/1/3/1/8/131856725/lijunabozoz_gedifizenibu_xixunefibadi_vuwures.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/1/0431/1190/7488/files/invitation_to_computer_science_8th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/fudugujaxexejolapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1312/7844/files/javascript_hash_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6119/0554/files/69435281298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8826/2821/files/64029862931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/201823564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/bixajavufowapudisem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/ludadijuzipimam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/59908457510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0210/0886/files/85574765042.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 8

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_off0000c914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC914 5008 bytes
SHA-256: 0d42e733441a1301c5ee6cb17e526bbd3ef6802596899170e402622d2eac56e1
font_01_sfnt_off0000da2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2F 11416 bytes
SHA-256: e7a55bb488412cee38f0e46e6736c41002bc343126daba4e22cf90c07621c50e
font_02_sfnt_off0000ff4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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