Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ef1ee544e2d538…

MALICIOUS

PDF

49.0 KB Created: 2020-08-10 10:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7942fb3ab87470ae029639af0e8f2636 SHA-1: 3d2c82bccdf050c768d1b1dc4a518dd5282de32c SHA-256: 73ef1ee544e2d538792e16c034e1fe13593ef4ea82dd92c91be8cf7780e66378
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure to disguise the malicious intent. The ML classifier strongly indicates maliciousness, and the presence of a redirector link suggests a phishing or scam attempt.

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=car+alternator+repair+pdf In PDF document text
    • http://files.ncgconsultants.com/uploads/1/3/1/4/131453325/2bd26de220a84bc.pdfIn PDF document text
    • http://files.rominaberenicecanet.com/uploads/1/3/0/9/130969331/3475811.pdfIn PDF document text
    • http://files.lyndseystlc.org/uploads/1/3/0/7/130776611/9304126.pdfIn PDF document text
    • http://tiwetizob.lemonsqueezykb.co.uk/uploads/1/3/1/6/131606407/29258325495ff.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/1/0431/4100/5480/files/bukosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigagijewunafusigiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/wunawowenixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0308/3928/files/21099509406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/33027785873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/minecraft_survival_games_servers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/writ_of_quo_warranto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/wunozajeketotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/cinematography_theory_and_practice_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/25726607546.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8335 4760 bytes
SHA-256: 9b68626b8c133d3c5ed32554394668a9d2f8af70759604c3cbbdd07773d37c2c
font_01_sfnt_off00009372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9372 10480 bytes
SHA-256: 7b04dabac252ff523b0baab83c0b311b402baf33b994ea08a92038fa086c20f4

Open this report in the interactive analyzer, or submit your own file for analysis.