Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b635c5d14c2a0ea…

MALICIOUS

PDF

46.1 KB Created: 2020-08-21 21:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 225c2ca552317a091003d851c0e86f89 SHA-1: 1b20b6a6ccd21112d3779babdd2299701083810d SHA-256: 0b635c5d14c2a0ea529d6eaef65d86da38c96693d2f2502392d7b1f2a9d77f82
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, suggesting a phishing or scam attempt disguised as a free download. The embedded content, while obfuscated, includes the malicious redirector URL and benign-looking PDF links, likely to appear legitimate. 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=alvin+and+the+chipmunks+1983 In PDF document text
    • http://files.bullengarookadultriders.com/uploads/1/3/2/6/132681596/fomapofegaro-wopigadazodup-zevevamer-tirexilagenizo.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/1/0450/1274/6390/files/verb_tenses_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2121/3591/files/13512259100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0718/4793/files/caida_del_imperio_romano_de_occidente_causas_y_consecuencias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/xonojevipofanigubamodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/79487483786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/40949476188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5373/4298/files/aptitude_and_reasoning_book_for_gate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9190/9025/files/62690799058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sakemiribukewud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6820/2901/files/21433018246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7732/1379/files/60129653337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6354/9845/files/kuwapojevagunigusanixalip.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_off00006d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5B 5896 bytes
SHA-256: a026fb2c2ed1804ac78c7b0f0b68ae4566b625cc6064f973944254c45813561c
font_01_sfnt_off00008146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8146 13504 bytes
SHA-256: ac83b73fbcfbd5516962b58641c2a5ecf436e7a7cf8e739d41852a791426297a

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