Malicious PDF — malware analysis report

Static analysis result for SHA-256 768a51da25787b53…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 11:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f11bcafce9ee7878b2dcc3947694fd74 SHA-1: 912cecb7cd41ba5b93514ea7022ba3c5a81b39f7 SHA-256: 768a51da25787b53082e277af71df067008bb41100148e04beb3cbdb59828c38
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service, suggesting a phishing or SEO manipulation campaign. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to malicious sites for further exploitation.

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=above+average+returns+pdf In PDF document text
    • http://mekeme.indianagolfsolutions.com/uploads/1/3/1/1/131164250/sufomiloz.pdfIn PDF document text
    • http://files.heatherhikes.com/uploads/1/3/0/7/130776674/pabunatox-wosuki-nuzesum-vogewiluwu.pdfIn PDF document text
    • http://files.micahmcgivern.com/uploads/1/3/2/8/132814050/ripaw_dewebezon_niwimokegone.pdfIn PDF document text
    • http://suter.startupsuccesspodcast.com/uploads/1/3/0/8/130874493/1749141.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/1/0432/1257/0787/files/zuzavubivopobatejubilaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3879/2085/files/zoxojibip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/53545654374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8558/5820/files/lazesopire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/96331087206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/49316771496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5024/3995/files/approximation_theory_and_approximation_practice_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/aramaic_english_new_testament.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/assembler_des_ensemble_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0402/5242/files/fermentation_process_in_biotechnology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6851/2669/files/lorili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/pip_install_matplotlib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/arnaldo_crdova_la_ideologa_de_la_revolucin_mexicana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/ragasamemigirerun.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD3 5364 bytes
SHA-256: adc6f18eb1c189aa603f5850038d781e0d142bfa59b75b57adb5552966295e65
font_01_sfnt_off00007d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D25 9988 bytes
SHA-256: 37748b832574445ad3a8610dd107d41fcbbfe17f21eea3c006d40b62b52cc02f