Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21de37b0a1caa6e…

MALICIOUS

PDF

50.0 KB Created: 2020-08-26 03:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af9c7b97211d56535f179cef8d56ef74 SHA-1: 11e2430d2646f9a5ca259136763fcd96613ed7b1 SHA-256: e21de37b0a1caa6ef8e30b44df71a206c9b8e4a5369687d4fed1fdbe4ef54e84
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external links, many hosted on Shopify. The document body, though partially corrupted, contains text related to 'perverted education coach guide' and the malicious URL, suggesting a lure for malicious content or phishing. The ML classifier also 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.com/pify?keyword=perverted+education+coach+guide In PDF document text
    • http://nurovos.southwickchurch.com/uploads/1/3/0/9/130969260/tufisu.pdfIn PDF document text
    • http://wubog.rdcapitalpartners.com/uploads/1/3/0/7/130740257/larira.pdfIn PDF document text
    • http://files.esdaw.eu/uploads/1/3/1/4/131409200/6376147.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/1/0429/0487/9267/files/nudejatotorelunatipubemiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1226/7937/files/nezajonaxedoseramubas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/advantage_and_disadvantage_of_social_media_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/54161382537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/laravel_html_to_package.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8960/9109/files/lobuxekogapujes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/rupuwiraguwagaveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7261/0464/files/mitosis_coloring_worksheet_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/tent_card_word_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/rationale_example_ib_english_b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/57789476183.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 5

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_off000085ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AD 5052 bytes
SHA-256: 68d0623cc818820f770219b793cdf1fa67daa65a70e68ad436b24a3501957c6e
font_01_sfnt_off000096d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96D5 10564 bytes
SHA-256: 1c82e005a26daf85438d669c66b709e6b56212574bdbbaad45a784ca7daf0b6d

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