Malicious PDF — malware analysis report

Static analysis result for SHA-256 82399e93503d69e3…

MALICIOUS

PDF

46.4 KB Created: 2020-08-22 07:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 72c6e10044504d1bbc3908a09599065a SHA-1: c72587d8f42885b8c58b68c0db6dc556b161676f SHA-256: 82399e93503d69e3729fff3526723f837e13e1b3f7a70854556bc5067c19293d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing campaign. The primary malicious link, 'https://ttraff.ru/pify?keyword=burkhalter+holding+ag+annual+report', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of many benign-looking Shopify links alongside the malicious one is a common tactic to obscure 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.ru/pify?keyword=burkhalter+holding+ag+annual+report In PDF document text
    • http://files.jmn-i.com/uploads/1/3/1/4/131411539/sanorezizobe_velufok.pdfIn PDF document text
    • http://files.coobcoffee.com/uploads/1/3/1/4/131437750/da084fa3cf7e.pdfIn PDF document text
    • http://xevojo.emilyfuchs.ca/uploads/1/3/1/4/131409236/sopaxama.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/1/0431/0423/9770/files/artie_shaw_clarinet_concerto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/samotal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/55252267877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0714/7162/files/solomabujujixejegamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/nigetekat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5713/3221/files/captain_america_comics_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8000/6294/files/catalogo_avon_campaa_4_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/5275382561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/71129197676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6472/8483/files/54316667362.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 5036 bytes
SHA-256: 26c66ea556fc7f436ed7c08a0852e78c49909d782148ca8d1c6411a945192dee
font_01_sfnt_off00007811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7811 11292 bytes
SHA-256: 957521158425214f369c37be8b13b142be0f62b4aa1f0ec5a67d42a276a565ce
font_02_sfnt_off00009e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E92 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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