Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e053ac0bc07c34…

MALICIOUS

PDF

42.3 KB Created: 2020-08-15 07:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da4a9a4eb33d5e4c3c19baf247bac492 SHA-1: 27ed145cf22535b27b4884e0e51586f1b1adae9b SHA-256: 90e053ac0bc07c349281d640f4151f3a0afedd89a32f706a25ae44b2ed648e66
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be a malicious link embedded within the document.

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=structural+building+components+pdf In PDF document text
    • http://files.escaperoom.solutions/uploads/1/3/1/4/131437376/bosogu-jakatewo-papajiwajijume-buluvumedefasol.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/1/0431/6325/4944/files/39213382585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/17414114570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/inspirational_biography_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5883/0231/files/logic_welcome_to_forever.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/dalimixilotagub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0232/1307/files/enfermedades_del_pancreas_exocrino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/2001_jeep_grand_cherokee_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/bowexebabolakafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2481/3977/files/jazezotominosavifubib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/95317448441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/knock_knee_exercise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6445/8405/files/kevin_gates_2_phones_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9588/3925/files/zumarinelovasidik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/1658557488.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 2

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_off00006761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6761 5716 bytes
SHA-256: acb31c4297ac0db1ef7546bf72eb842b35c37e3016b472263f4f1b6d2f6810d4
font_01_sfnt_off00007ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB4 9868 bytes
SHA-256: 96c6cd4b3e1d4f057782f5ece006f2d111a8b8ef1ed3ac00be89f96889958954

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