Malicious PDF — malware analysis report

Static analysis result for SHA-256 158d44c69943d032…

MALICIOUS

PDF

33.1 KB Created: 2020-08-22 01:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 29360410d545034c6f4d6d5a17506cde SHA-1: 93392cb7f9ba928fc6420227c522a27cef7c279d SHA-256: 158d44c69943d032d2cc345af6c4ed0f1902669b429492be9152d648e4668f1e
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body, though heavily obfuscated, contains a URL that leads to this redirector, suggesting an attempt to lure the user to a malicious site. The ML classifier also strongly indicated 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=arabic+calligraphy+workbook+pdf In PDF document text
    • http://files.healthyhap-peanutrition.com/uploads/1/3/1/3/131383791/8095551.pdfIn PDF document text
    • http://zuvewuda.kaystephan.info/uploads/1/3/1/0/131070718/nozokoko.pdfIn PDF document text
    • http://files.heramoon.com/uploads/1/3/0/8/130873922/6469462.pdfIn PDF document text
    • http://files.physiotherapyassociates.co.uk/uploads/1/3/2/7/132740378/jibupisifa.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/1/0431/3936/7061/files/appraisal_letter_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/separation_of_blood_plasma_and_serum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2088/3880/files/kosoxadelalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/pdf_to_word_online_job.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7287/1832/files/agmark_standards_for_ghee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/fokigemune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/deniroxow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/94873311706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/zezelodafawatidotuwan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1946/4867/files/cuento_bienvenido_bob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6960/files/fuxujujekutorobegesir.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 7

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_off000043b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43B9 5624 bytes
SHA-256: 8eb8703b13b7a6d7619bbe9ed369fdfbb47b301b41978110c8c1a7c2012c01c4
font_01_sfnt_off000056e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E2 9700 bytes
SHA-256: 90ae69af1a8e2986173b044433e0784af714fa3356d0b9f73876d39c6cb55663

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