Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12c20787b2820f2…

MALICIOUS

PDF

51.0 KB Created: 2020-08-21 12:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17eed1dd95af251f1ce49378ffc3cf20 SHA-1: 16aa26122a8b2762f40c57372a06e23ea4490176 SHA-256: f12c20787b2820f26a60cb10b2f36d2e19d883b85fd7d45d3e521b163e06cb7e
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=boyce+codd+normal+form+in+dbms'. Additionally, it features a large number of embedded links to other PDFs hosted on cdn.shopify.com, suggesting a link farm or SEO manipulation tactic. The document body itself is heavily obfuscated and contains some of these URLs, but does not provide clear user-facing content beyond technical metadata.

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=boyce+codd+normal+form+in+dbms In PDF document text
    • http://files.kimrichardsart.com/uploads/1/3/0/7/130776118/ketibajerazexase.pdfIn PDF document text
    • http://files.salsaandtea.com/uploads/1/3/2/6/132696506/fusexi-tudedusabujoji-zijiper.pdfIn PDF document text
    • http://files.sdra.org/uploads/1/3/0/7/130776166/8645756.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/1/0433/2906/1032/files/remove_brackets_from_excel_spreadsheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1892/3686/files/el_cine_mexicano_actual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6917/3923/files/stellaris_human_name_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/womoroturafedidarubajesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/3559/2613/files/beehive_class_9_chapter_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/puwetodarekobokujipawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6395/7909/files/mizefituzodopiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/fusizijulimabejasose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30552771564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/jepamuli.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000714c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714C 5460 bytes
SHA-256: ee2dcb63b97cd61fd41a2397cde68a36dcd3edf6cc018730a5ea17ba8ed8cfb1
font_01_sfnt_off000083bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BD 11732 bytes
SHA-256: 12672efa426a17f8cef46c5fdfc403bb0b2aa0df835fde4bcd0e6428f1d5d898
font_02_sfnt_off0000aa0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA0A 16204 bytes
SHA-256: 219e5e1e4ad9fa058d4117ca79455666a6d8ea411adfac20ab5c0d669d2bb2b7

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