Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b0e5adaf8fa457…

MALICIOUS

PDF

56.1 KB Created: 2020-07-31 22:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e502883d0f09502cf61894d8b2821af SHA-1: d2bcf859390282a54903b54969aa87f72204dff8 SHA-256: 18b0e5adaf8fa457942ff43b07ecc378e415c556bf110dc55a55d0913328ae52
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector infrastructure (ttraff.cc) and a link farm of other PDFs hosted on Shopify. The document body, though heavily obfuscated, contains the text 'Class of 3000 backgrounds' and the malicious redirector URL, suggesting a lure for users to download potentially harmful content. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=class+of+3000+backgrounds In PDF document text
    • http://files.abarthdrivingschool.co.uk/uploads/1/3/0/8/130814466/3395625.pdfIn PDF document text
    • http://files.mi-sheffield.com/uploads/1/3/0/7/130776484/82eaee87bd634.pdfIn PDF document text
    • http://files.digivationsxgens.org/uploads/1/3/1/0/131070604/jubopepukuzodeduzo.pdfIn PDF document text
    • http://files.w4sight.com/uploads/1/3/1/3/131379622/7131092.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/1/0431/3264/9636/files/movebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/bisoneso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/11626253673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/87848094455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/rojenonok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/noligerazul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/15626260794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/xevesiwarigalokug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/93194843282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/megesupugigukerir.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_off00008b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9E 5360 bytes
SHA-256: 40b21f5652156f1d56e5bf2c8997bc40b48e8939a3a5798842cd1e4a429b777c
font_01_sfnt_off00009dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD0 12520 bytes
SHA-256: 3c1fb2b914f070d3ff920e8c15a6d57debc29d7ab1b63e9e60240748f1df266e
font_02_sfnt_off0000c5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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