Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd6d40b0519c19b…

MALICIOUS

PDF

39.7 KB Created: 2020-08-13 22:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05f5b7467696e41d507983e6b623d9a5 SHA-1: 6bcac3f90061a63250ffc0472754299e28532702 SHA-256: 4dd6d40b0519c19b84343240b426812bd77dbafc40cd64947a09ee054036ab1e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=limiting+reactants+and+excess+reactants+worksheet+answers', is designed to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a phishing or redirection scheme.

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=limiting+reactants+and+excess+reactants+worksheet+answers In PDF document text
    • http://tadofan.galliltd.com/uploads/1/3/2/6/132682076/pemagixisa.pdfIn PDF document text
    • http://files.themerchantsguildstore.com/uploads/1/3/1/0/131070911/13f7d.pdfIn PDF document text
    • http://files.voyageoftherascal.com/uploads/1/3/1/4/131453188/wowaluzuribarosif.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/1/0428/9835/8432/files/23342697578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/90602199280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/79985496864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/19084620307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/wugej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5388/files/advanced_mathematics_1_by_pandurangappa_c_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1247/0422/files/beats_audio_apk_unrooted.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/tokoduxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8691/3439/files/lededilarusugitevubozod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/argument_fallacies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/furizokizakori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/84924744650.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_off00005e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E85 5484 bytes
SHA-256: af3a61f1b94976cfdfc797a109b626b7912e2fc63ede39c597fefe7a336c4f08
font_01_sfnt_off0000710d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710D 9456 bytes
SHA-256: 2320a434dee1e911c6412f631f78cab9e77be32543f12d7193f11c868fd8243e

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