Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd433da6e164b12…

MALICIOUS

PDF

42.5 KB Created: 2020-08-26 17:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 22d8d9140c139b8dc99e2af948ce14a3 SHA-1: b5b998d1354b02f8c5bdfb827eeab8c436b8cb07 SHA-256: 3dd433da6e164b12fd0c6d493db74af51a92197d7afd356397d6edf56263b88a
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is associated with SEO spam and potentially malicious content. The document body, though heavily obfuscated, contains the same URL and references a 'free download', indicating a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of link farms used for SEO manipulation to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=fall+out+boy+centuries+mp3+song+free+download In PDF document text
    • http://files.stcsymphony.org/uploads/1/3/0/7/130739351/1545064.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0437/7912/9501/files/wafowakoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/59372700178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/balance_general_cuentas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/7999371200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/96170305912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/mafogijexoker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kijajakunij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/5301/5189/files/diesel_generator_maintenance_log_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/vuzopozimupal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9141/8518/files/wagoragawowowepokija.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4829 3036 bytes
SHA-256: aa5372358103b7cc4ef908374b598f052ee1396b52dcf70fa50afca2ab89f292
font_01_sfnt_off0000550a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x550A 2900 bytes
SHA-256: 80f6c4cc1cac62fcdf270cb3b13cd853bb6d6ecbb19aaeb88519258173a38598
font_02_sfnt_off00005f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F62 5928 bytes
SHA-256: 80fc22c189741020fa92e7f9595a7631c2ee833ebd3646dabddc53870343bbeb
font_03_sfnt_off00007387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7387 11900 bytes
SHA-256: d58ebe629c838afd8f0eb6a62d20d70224f21c105ec1034c2b0eac3a7a00f58f

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