Malicious PDF — malware analysis report

Static analysis result for SHA-256 959609abd709e9c4…

MALICIOUS

PDF

39.2 KB Created: 2020-08-09 11:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15421541f69c158542ceeb7dd8f4bc56 SHA-1: 5f0aa751ab5f85f8e613ef00ed8abf6bfcc1d092 SHA-256: 959609abd709e9c49206d9974c625723a2607d7184b1d04896523c0d738f8eca
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'cbse class 10 answer sheet format pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of a link farm further indicates a malicious distribution strategy.

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=cbse+class+10+answer+sheet+format+pdf In PDF document text
    • http://files.themslist.com/uploads/1/3/1/8/131871814/nuzikemazumupi.pdfIn PDF document text
    • http://files.vogelacupuncturecare.com/uploads/1/3/1/8/131858592/diteseparefupagal.pdfIn PDF document text
    • http://files.bayareaoverhead.com/uploads/1/3/1/6/131606118/d1e7e3.pdfIn PDF document text
    • http://files.steeplejam.co.uk/uploads/1/3/1/4/131453054/dutiviseli.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/1/0435/4228/2394/files/questes_administrao_geral_e_pblica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2727/4647/files/4975330057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/39622103989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7895/0810/files/mebuxuwavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6794/8706/files/lynda_randle_one_day_at_a_time.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/30258425439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9050/1020/files/vebid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/modawata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/31683429530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/nuposuxo.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 5

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_off000059f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F2 5724 bytes
SHA-256: 8b8e241df2be436fa9a9d46e1f15ba1b0bca178dd98c6c63aef4ad6ad1c82648
font_01_sfnt_off00006d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D54 10248 bytes
SHA-256: e363c29ff47e832158094d5ae3b088abad948b23ca7455ae18090defae36c843

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