Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd3ec46fd4f1f5e…

MALICIOUS

PDF

39.6 KB Created: 2020-08-03 19:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e94a112ff21ad4e4dc6cdc1f283146a SHA-1: e330515c0bbd6251e4ee96fccfb0035b89f05860 SHA-256: 3fd3ec46fd4f1f5ef59adccfe01bc354a1a353e36707c9f0136a856e329eb768
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=bioquimica+clinica+baynes+pdf', points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the same malicious URL and several benign-looking Shopify URLs, suggesting a lure to disguise the malicious redirect.

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=bioquimica+clinica+baynes+pdf In PDF document text
    • http://files.nwcoasttrader.com/uploads/1/3/0/8/130815017/395bca25de47.pdfIn PDF document text
    • http://vemuzux.karenstever.com/uploads/1/3/1/4/131437812/nigififarovazela.pdfIn PDF document text
    • http://files.keyboards.es/uploads/1/3/1/4/131438501/gukerozokobetu.pdfIn PDF document text
    • http://files.nichehcb.com/uploads/1/3/0/7/130740367/funituwijudata-jitapo.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/1/0433/0687/7080/files/17810153535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/80163730946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/35337277374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/xudakexonibewavolavigewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/18228196141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/lukabesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/79509234115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/5372838315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/23320664016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/bavifipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/24979394936.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 4

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_off00005d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 5620 bytes
SHA-256: 41d0a01d03638380f2aa3b3db517d02d31c07942691f57429cec9dca1fea0399
font_01_sfnt_off00007090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7090 9648 bytes
SHA-256: acc054edbe4b277687ae1037066940aaf7a6158ce91e2b60fa1a1905db50c9c4

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