Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7dd7b748e8816fe…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 21:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 384fc07c4a54709cf982fbc50e7d984e SHA-1: 3b77de48da3a280a3d3a450e9246a107c6044d35 SHA-256: b7dd7b748e8816fe979cb0739103f18de75f549a5949aac49e2f6f46e96a6629
194 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'Honeywell t4r wireless thermostat manual' and embeds a large number of links, many pointing to external PDF files. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern appears to be SEO manipulation or a link farm used to distribute malicious content or redirect users to phishing sites.

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=honeywell+t4r+wireless+thermostat+manual In PDF document text
    • http://zetade.mariettasquarefarmersmarket.com/uploads/1/3/1/0/131070382/fajoxomejajej.pdfIn PDF document text
    • http://files.thecactusroom.org/uploads/1/3/1/6/131637271/nebefetike-biginenijan-xodipejopox.pdfIn PDF document text
    • http://zuzusit.maryzambello.com/uploads/1/3/1/6/131606666/8190874.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/1/0430/1275/1523/files/mapa_provincia_almeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/4699599230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0278/0072/files/84262966796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/xikukafumijomaxulosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/duboruzetejejomed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/bemigulamujutizekosafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0755/6258/files/45304152516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/as_catacumbas_de_roma_minhateca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/bleach_episodes_366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/lsat_logic_games_bible_workbook.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_off0000607e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607E 5168 bytes
SHA-256: dc9fd838e5f5848f13c48cef6c572d844fd00f1959a73d2e40bee3bf74d5bab4
font_01_sfnt_off000071fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71FA 10376 bytes
SHA-256: 446cb5e3b3c713e6bb94ca7a3c7be1aaa99fb8304dacd5281fc145e72929fd7c

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