Malicious PDF — malware analysis report

Static analysis result for SHA-256 100c79a9b7697190…

MALICIOUS

PDF

42.7 KB Created: 2020-08-08 08:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2beeb3be894ea350254d6700d7b3309a SHA-1: 5a8ddb0cd2a9de8bbff68dd12962a24185661821 SHA-256: 100c79a9b769719060687860caf355040efcc97ac64940d36f1d7be04c83c639
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading a PDF, likely to disguise the malicious redirect. The ML classifier strongly indicates maliciousness, and the presence of numerous links suggests a link farm or SEO poisoning attempt to distribute malware.

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=history+of+science+fiction+literature+pdf In PDF document text
    • http://files.suezn.com/uploads/1/3/0/8/130873914/tugixaj.pdfIn PDF document text
    • http://files.darkmattercomposites.com/uploads/1/3/1/3/131398184/fatuvoguwovimob-xoxoxetivon.pdfIn PDF document text
    • http://files.annemckeestoryteller.com/uploads/1/3/0/7/130775002/b935ccafc61a89d.pdfIn PDF document text
    • http://files.amoebasisters.com/uploads/1/3/0/7/130738955/wofadimokiw_dimebapowu.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/1/0447/9824/7069/files/ggplot_reverse_axis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/32388810369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0250/2048/files/ikea_catalog_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/windows_7_hosts_file_location.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/xilatokomagubonif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/42508180489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1342/0702/files/creative_writing_activities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/acoperamantul_maicii_domnului_acatist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1351/2100/files/chemistry_periodic_table_of_elements_with_names.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/south-_western_federal_taxation_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/60531638385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/letusovujevuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4621/4551/files/63406532193.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 7

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_off000069a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A2 5212 bytes
SHA-256: bbc713bac8cecc63c0d4b04c60798889863272f7108af8c3646c575f5f757879
font_01_sfnt_off00007b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B78 10012 bytes
SHA-256: 91d9a4565ade53e9bb7c4ea0005eb4f666562f16c2b4303aa8926e69db27f59f

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