Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b748e91727be21…

MALICIOUS

PDF

50.7 KB Created: 2020-08-05 00:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0fea94c953c53b052d5be9c059f15e9e SHA-1: 50f574c8e0f037792d2daa3035b65c94044dcc7c SHA-256: 83b748e91727be213dd574fc2540d7f3f874340c6da511e4c8296ebc7660f7e6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm designed to lure users. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves using a link farm to direct users to malicious infrastructure, likely for phishing or malware delivery.

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=html+to+pdf+using+react In PDF document text
    • http://files.familyfirstinflatables.com/uploads/1/3/1/4/131452949/d359c596.pdfIn PDF document text
    • http://files.lukestoneart.com/uploads/1/3/1/0/131071240/suxubokeruwab.pdfIn PDF document text
    • http://files.deerwoodmensclub.com/uploads/1/3/1/3/131379246/2361912.pdfIn PDF document text
    • http://files.rosminicentrewisbech.org/uploads/1/3/0/9/130969728/vekogud-tositujane-pafinadox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/90563758284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0486/2375/files/40641102572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/cours_grammaire_francais_facile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/jolovimixelomadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/definition_of_economics_by_different_economists.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/xazaxuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/5721238651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/18135275499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/4427913680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/25607493521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/diworawusegazosigap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/kobuwexen.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000648e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648E 5316 bytes
SHA-256: 1204f4e5bfdcfd92957424f04ae746750f6ad71559dfd358cdd67b51006d5fb5
font_01_sfnt_off0000767f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767F 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00007f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0D 15512 bytes
SHA-256: c5df990d598b4951bc3b2642c071f8e7aa47efecb9464ab17c884a83e64b22f0
font_03_sfnt_off0000af93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF93 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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