Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cf917db901f350…

MALICIOUS

PDF

51.0 KB Created: 2020-08-05 17:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37674c9490ade7f9127b7e9c1cb2087b SHA-1: f6de31ab44373c7cf88a0b7eed775bd3632f7ac4 SHA-256: 85cf917db901f350215be645f771bb4e83a5d2d4804b0bdf8ec7eaaae5b953d6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to create an SEO link farm, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL pointing to a redirector, suggesting a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=reformas+borbonicas+en+america+pdf In PDF document text
    • http://files.sharingserenity.co/uploads/1/3/0/9/130969989/golevazupu-geris-tujodamofivewav-kogupa.pdfIn PDF document text
    • http://files.marziaclinic.si/uploads/1/3/0/7/130739163/a1bf7d06add35.pdfIn PDF document text
    • http://files.valeriesplayhouse.com/uploads/1/3/0/7/130739024/kipanulemi-torarojapokesa.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/1/0431/2891/4074/files/21058187868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/lorepovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/jamabivavuxuvenoziwitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5238/3907/files/dakatugogosasepogiwol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/wosodapozafulajafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/56404707721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/ccna_data_center_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/53419742200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/54326796270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/tawadamezuxepone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8722/3198/files/namojugedapiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4238/1725/files/california_residential_purchase_agreement_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/78383645582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/dependency_injection_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/sasivupivimotufobuxevu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8560 5416 bytes
SHA-256: 99452436948df9996acead2485df5a745a5583edc99194cc20fef505c28893b1
font_01_sfnt_off000097b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B2 11400 bytes
SHA-256: 1f03da782f5d61b3e5f3bc00080103c49e031fe1ac19f7d72d733ac4f3f5c6d2

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