Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28e552bb676c066…

MALICIOUS

PDF

50.5 KB Created: 2020-08-17 06:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed31477e17a7cde1c460150cdf44d07f SHA-1: 8a3a89d7e79e9e39bf5193e8e02043f6f811fc83 SHA-256: a28e552bb676c06639ed088be66c8820ae15d66065580744e1a5def2124c01a7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, includes the primary malicious URL. This suggests a link farm attack pattern aimed at luring users to malicious sites.

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=narasimha+movie+songs+free In PDF document text
    • http://files.wereherenonprofit.net/uploads/1/3/2/7/132740930/1783848.pdfIn PDF document text
    • http://temuzepaw.classicarcaderenovations.com/uploads/1/3/0/7/130776068/5442322.pdfIn PDF document text
    • http://files.explainingmaths.com/uploads/1/3/2/7/132712447/tisex_vuviz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/kofipogidotaninujag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/58320660037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/51448932906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/47872161981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9263/0940/files/dwg_trueview_plot_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2009/7448/files/pufofafapotobotasedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/77022960654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/best_selling_self_help_books.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D2 4884 bytes
SHA-256: 17bf71900eca68b1020315281a27151ff4cc97e743f708a9acad2881b254972a
font_01_sfnt_off00008846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8846 12400 bytes
SHA-256: 721249641eb809b3039443b36ef125b719ac6afd8c30a85fcb08c8986fecee6d
font_02_sfnt_off0000af79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF79 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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