Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d81fe7fa1f2119f…

MALICIOUS

PDF

35.2 KB Created: 2020-08-15 22:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad393d69689c467bb74a17e4d1e84cbd SHA-1: 573b667ceb30f82b502e7dc1fbe22b3aa3a8a30f SHA-256: 9d81fe7fa1f2119f021cbe14204e1176dbc90bba327fb811a7d2b917a1ef387f
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to ttraff.com, are indicative of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains numerous URLs, reinforcing the link farm heuristic.

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/wb?keyword=farmacognosia%20aloisio%20fernandes%20costa%20pdf In PDF document text
    • http://zanek.linkedenergy.net/uploads/1/3/1/6/131637136/2c2bbc603f.pdfIn PDF document text
    • http://files.playmusiccompany.com/uploads/1/3/1/4/131483343/xurepu.pdfIn PDF document text
    • http://files.woollens.ca/uploads/1/3/1/3/131398308/midixebozevute-safiwipamagevi-jabodefokajudek.pdfIn PDF document text
    • http://pesebap.mendonillinois.com/uploads/1/3/2/6/132695550/xizezuwenusa-kuruja-bunuvidaguves-voxemamasu.pdfIn PDF document text
    • http://files.northalabamadt.com/uploads/1/3/1/6/131636807/3374ef.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/1/0434/8457/7958/files/ridamivevesanadivudojijur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/nisugomadobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/lavukigumina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/50966443582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6654/6583/files/aiag_vda_fmea_handbook_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/tamexavajafevafolofikibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/histrionic_personality_disorder_dsm_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/memamatetazunafexaxanef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/6719930239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/28756958484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/tatigizujokarebomo.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_off0000479a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x479A 5432 bytes
SHA-256: 66a6aede2ec31fe543bff4abb68a538efa05e93bb3c081b0ac181270a7b120de
font_01_sfnt_off000059f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F5 11664 bytes
SHA-256: 1cc5d13b34bc124a9f1936944e6933aab7b4e0ca682a9c6e14cd1eaa229f0abc

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