Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d97d5bec584784…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 14:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9a681f205a3f12837ed0f8744e884dac SHA-1: 8cc2c7405282d38105bd728f0f0b2ce958cd68fb SHA-256: 38d97d5bec584784a1cc08c180842419aae808bf4c32bc8fff1f2229965d668e
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=authorship+guidelines+medical+journals`. This URL is presented within the document body, suggesting a lure to trick users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on `cdn.shopify.com`. The ML classifier strongly flagged this PDF as malicious.

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=authorship+guidelines+medical+journals In PDF document text
    • http://files.lcorelca.org/uploads/1/3/2/6/132681164/a8c53e40e7.pdfIn PDF document text
    • http://files.debirestone.com/uploads/1/3/0/7/130776088/7680944.pdfIn PDF document text
    • http://files.healersnews.net/uploads/1/3/1/4/131408017/dijewomiladid_tozekazaliwem_wixozisigil_lewag.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/1/0430/8090/8949/files/91756007916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/povuxakobugazugewidetox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9977/4364/files/ebbelwei_express_fahrplan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/kuxadajisugovigisad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/9753655756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/learning_and_development_framework.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/85742962145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5050/8194/files/jogozinepejezigujizujibip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1773/1229/files/ziniputigomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fufalelavajukunegaxiz.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 3

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_off00006d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9E 5552 bytes
SHA-256: c509345264ee1e00bae913748d497be46ff8d69779ab4a2cb99adf0cc16fbbae
font_01_sfnt_off00008055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8055 10076 bytes
SHA-256: 4f7a027594bbba431ad0d4062adbc89f90e100ed4a7eddf6ba720c8dd471bcfd

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