Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe55b3b3fa230603…

MALICIOUS

PDF

39.9 KB Created: 2020-08-08 02:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e0a844692a43c04058a1121e38d3d2b5 SHA-1: 081f38256ce49d4db3e71acbd0fee7e391f63256 SHA-256: fe55b3b3fa2306036b243954e9afef410447455dafcdfd6576f6d7bcb38fc3b0
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs, including the malicious redirector. The heuristic firings strongly indicate malicious redirection and a link farm, suggesting the document's purpose is to drive traffic to malicious sites.

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=adjectives+in+english+language+pdf In PDF document text
    • http://files.pattikitson.com/uploads/1/3/1/6/131607866/xowizabijon-zozutisogab-pazogo.pdfIn PDF document text
    • http://files.naplesbesthairsalon.com/uploads/1/3/2/6/132682640/lupaxogol.pdfIn PDF document text
    • http://files.unparalleledtransformation.com/uploads/1/3/0/7/130738894/dazix-fukosisumiwe-xusavaniruwukiv-xilanel.pdfIn PDF document text
    • http://files.ryabutterfield.com/uploads/1/3/1/1/131164117/6080261.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/1/0429/8702/8641/files/regegidofidojofafitudox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/piezo_buzzer_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/7082674752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/roadmaster_mountain_bike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45397061855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5175/9269/files/convert_file_online_for_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3386/1018/files/third_generation_cephalosporins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/kifenaporagitogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/mipuzujuwosuwizofide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/nanatixome.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_off00005e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E86 5444 bytes
SHA-256: 6c356e2bf4cb4bfe56b65ebad7c28af1537775315c77b2124348c6914d9645c7
font_01_sfnt_off00007122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 9880 bytes
SHA-256: 17214b098f4d1126d043a787dc4c3525b63a2fe3db24ce30538d5f06e35dc737

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