Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff43d6e6ca8664de…

MALICIOUS

PDF

41.7 KB Created: 2020-08-15 00:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 63ac5617bba8db5a0c7184f8b27fad9e SHA-1: 33c17879ce40cee0a535e3358f3c69e73b2cb5bc SHA-256: ff43d6e6ca8664dedd55d8a4aa11accdb0ed858083eb226d15d8460dd7aaeafa
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO link farms or to direct users to malicious content. One of the embedded URLs, 'https://ttraff.com/pify?keyword=stomatitis+aftosa+rekuren+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on various domains, suggesting a coordinated effort to distribute malicious content or phish for information.

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=stomatitis+aftosa+rekuren+pdf In PDF document text
    • http://files.runninghorseridge.com/uploads/1/3/0/7/130740056/mereguvarevij.pdfIn PDF document text
    • http://files.aimeehillmassageyoga.co.uk/uploads/1/3/2/6/132683154/7e0959846e.pdfIn PDF document text
    • http://salupi.vtrootsmigration.org/uploads/1/3/1/4/131453858/68de52ee1e53.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/1/0428/1381/6995/files/economist_special_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3213/8143/files/exercice_de_chimie_gnrale_atomistique_corrig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/scientific_calculator_tricks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/peptic_ulcer_disease_pathophysiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7004/5864/files/bezaxat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2629/1611/files/14536579746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/62488235128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/71780098259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/97042311840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0629/5196/files/nasm_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/crompton_ceiling_fan_catalogue.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 5

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_off000064a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A7 5324 bytes
SHA-256: bc6f3ae9782ff0563022e532cefad7e9628703ea50b9929a989dcb14eb2dfb61
font_01_sfnt_off000076a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A2 10428 bytes
SHA-256: c8f8c003aff811c4628ee51be10cdd590e43d8ce6665a75992a885ca922b3945

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