Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b8cc50a52c353f…

MALICIOUS

PDF

47.2 KB Created: 2020-08-28 01:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c336ded419ac8032c174dbb7a44fa60 SHA-1: 70ab320057ad293ec08cb13ad07b23ce52c71bd0 SHA-256: 40b8cc50a52c353f60f1acc64b7185bdb3569f49e9da1c4948a1c71db5a9ddd2
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. One URL, 'https://ttraff.ru/pify?keyword=perfil+del+paciente+hospitalario', is identified as a known malicious redirector. The presence of these links suggests an attempt to manipulate search engine results or redirect users to malicious content, rather than delivering a direct payload within the PDF itself.

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=perfil+del+paciente+hospitalario In PDF document text
    • http://wumusugel.spotlightseniorservicestucson.com/uploads/1/3/0/7/130740019/741584.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/1/0435/6761/2063/files/84614207376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/gejodeganefete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/sajuserororili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/5789/7623/files/22005555335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/tinileluxuwafiguvagipuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/nifivejawupelitokom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/xafesavuraravo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/zuvasisikolexopaxone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/airport_utility_apk_for_android.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 2

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_off000077bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BC 5244 bytes
SHA-256: 7b0d59acfc91d8ac3eedcd9d118ae915075316a1c21cc16b560736ee137be774
font_01_sfnt_off0000897b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897B 11428 bytes
SHA-256: 2b7d35501b61a16094eac524b2531568acdaf158bd5fbd1c8d8d806c1dc13e3e

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