Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c88368a0c4f478…

MALICIOUS

PDF

53.8 KB Created: 2020-08-02 21:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a403c409b926bdf578c4c214993f75e SHA-1: 3ee5699e94b0d1e86e3f7da06adf41300f47f40f SHA-256: 77c88368a0c4f478ea0b4c484e716505e04f8f2f8dc27e9ac66abf062584c34c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm and a redirector link, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. The embedded links, including one to a malicious redirector at 'https://ttraff.cc/pify?keyword=tcp+reset+attack', are the primary indicators of malicious intent.

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/pify?keyword=tcp+reset+attack In PDF document text
    • http://files.hemamikkilineni.com/uploads/1/3/0/8/130814636/ragejevomijabiza.pdfIn PDF document text
    • http://files.zamdevelopsj.org/uploads/1/3/1/1/131164534/7449164.pdfIn PDF document text
    • http://files.asproengineering.com/uploads/1/3/1/8/131856877/nepusikiguvopoge.pdfIn PDF document text
    • http://files.kcnb1.org/uploads/1/3/2/6/132696174/zuwam-wajev-vapowisujijaju.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/1/0433/0687/7080/files/fisebupujavilugux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/19370497360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/90559745863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6531/0373/files/mebapijerojomoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/21649789639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/bujajomifawekivegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8530/7805/files/xunaked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/ganumotawami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/watch_parasyte_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/16365218193.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 8

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_off00009735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9735 4908 bytes
SHA-256: 2a1aab6bb9d66686428478f20ed0d5f42ec7bf5dabe18bfc8cd31fd70a986f0e
font_01_sfnt_off0000a7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7FC 10192 bytes
SHA-256: d15b341cef7e7a250e31cb6ba313259f50867b265b8996cc744f49871e6171a8

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