Malicious PDF — malware analysis report

Static analysis result for SHA-256 18911976a22fbde1…

MALICIOUS

PDF

45.2 KB Created: 2020-08-07 13:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0adb64c46f320b5ccc1b3b8bf6dc64f2 SHA-1: 2607c59c501e6b467116ccc584eab56997ee973a SHA-256: 18911976a22fbde133cf4c8b5e499d322c0cf3546353e4fa72f2e3d28ed64609
194 Risk Score

Malware Insights

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

This PDF file contains numerous links to external resources, many of which point to a redirector service known for malicious activity. The document body, though obfuscated, includes the primary malicious URL, suggesting an attempt to redirect users to a phishing or malware distribution site. The ML classifier strongly indicates maliciousness, and the heuristic firings confirm the presence of malicious redirector links and a link farm.

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=analogias+ejercicios+pdf In PDF document text
    • http://bojilikub.connextionsmagazine.com/uploads/1/3/0/7/130776433/rovevomukazo-zopixu-mepewaxaxise.pdfIn PDF document text
    • http://files.themagnoliatrunk.com/uploads/1/3/1/8/131871786/895019.pdfIn PDF document text
    • http://files.backstagenb.com/uploads/1/3/0/8/130814535/6225992.pdfIn PDF document text
    • http://sagofifa.paulschocolates.com/uploads/1/3/0/7/130739385/wepekaletinita.pdfIn PDF document text
    • http://kuzataku.spartanac.org/uploads/1/3/2/3/132302780/dasikevetomeran.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/1/0430/4253/7629/files/bunonugoxagotutan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0166/5960/files/amadeus_peter_shaffer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/jijarevemad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/blockchain_revolution_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7770/1533/files/ccna_routing_and_switching_200_125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/10490965083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/minoxipurabunud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3969/2699/files/81591895310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/gebawavopepib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/86567128822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/34709503850.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 3

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_off000071ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EA 5388 bytes
SHA-256: 627c928496b318c2076f4880aecae49b0bcc076fed4d53507499f16f6a402b66
font_01_sfnt_off00008457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8457 11044 bytes
SHA-256: 89ae3f31bd0e03e25b6a7b6e210f2a7f76b06c966a4260d5fbb6c9aea4e7732b

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