Malicious PDF — malware analysis report

Static analysis result for SHA-256 11919c6d54b161aa…

MALICIOUS

PDF

40.1 KB Created: 2020-08-08 15:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad9e7b78d9cc188052310bb985113b3c SHA-1: 65ba6df34df526c82270364cc392e88f769ad547 SHA-256: 11919c6d54b161aaa55adac4ea4fa367be8b673ddb920790b8141ec0fd5e7b47
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to create an SEO link farm, with a primary link redirecting to a malicious URL. The document's content and structure strongly suggest a phishing or scam attempt, aiming to trick users into visiting the malicious redirector. The ML classifier also flagged this PDF with high confidence.

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.cc/wb?keyword=history%20of%20computer%20generation%20pdf In PDF document text
    • http://mezopa.holytrinityparishnh.org/uploads/1/3/0/7/130776499/be16f.pdfIn PDF document text
    • http://files.lornasredskygeckos.com/uploads/1/3/0/8/130813094/vuwomoriluxa-kimoma.pdfIn PDF document text
    • http://files.eaohp.org/uploads/1/3/2/6/132695258/6234520.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/1/0432/7361/7568/files/37586445731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/book_for_synonyms_and_antonyms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/pifepufivakagikiribofawep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/cevdet_bey_et_ses_fils.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/jupugawipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/nekutoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6763/5867/files/air_pollution_control_ordinance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9912/7959/files/adulthood_is_a_myth_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/certificate_of_appreciation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8927/8616/files/44474661747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/world_time_zone_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7602/5497/files/roruzamofinubajomololira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/44789543302.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 3

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_off00005e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E71 5508 bytes
SHA-256: 40cb121c0836cf310db5a71f5915336535e35a0d41eb80951ab808201bd9e96c
font_01_sfnt_off00007120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7120 10100 bytes
SHA-256: e087fadd49479f4c657dbed1fc977535065e6db79d15dbcd7daa800402caa713

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