Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d346b64aaaba1c…

MALICIOUS

PDF

41.3 KB Created: 2020-08-24 00:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 665c77b116ed06351c73a01f23e17227 SHA-1: 91ab395a2227b0aa7403a07579765791f550f075 SHA-256: 16d346b64aaaba1c83e52b1b785280300bf47297e5ecdf2b41ba522c1420185a
194 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, ttraff.ru, which is identified as a redirector for SEO-based phishing. The document body, though partially corrupted, contains text suggesting a lure related to an Excel error, likely intended to trick users into clicking the malicious links. The ML classifier strongly indicated maliciousness, and multiple heuristics flagged the PDF for linking to malicious infrastructure and employing SEO tactics for distribution.

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=can%2527+t+add+a+worksheet+in+excel In PDF document text
    • http://files.purplepotters.com/uploads/1/3/0/7/130739699/fopuni-wulol-sezabuwerefuwo.pdfIn PDF document text
    • http://files.kudzustudio.com/uploads/1/3/0/8/130814926/buviv.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/1/0435/7554/1919/files/christian_premarital_counseling_questionnaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/68353290596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4870/4920/files/effect_of_acid_rain_on_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/budget_2020_20_date_pakistan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2715/8424/files/wadebewupus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/la_boite_a_merveille_complet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/sakubafivufewixole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/61064264550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/45302959683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/vashikaran_mantra_in_telugu_free_download.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_off000064bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BF 5192 bytes
SHA-256: 2a6e88c089f68efe0ddfc75f62177173b046fdc551a04babae4261e5bc9de5b2
font_01_sfnt_off0000767b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767B 9800 bytes
SHA-256: c480a57338992b030e0dd8daffe6e54e6f610a7d76f312ae8fd5678c9f9fa0c3

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