Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b0beab8ec5c775…

MALICIOUS

PDF

47.2 KB Created: 2020-08-20 10:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6c5f3e229059ae4fefc8388b8f4826c SHA-1: 71c3eacb5dc8439834fc2310c240e0f49bf9d1c2 SHA-256: a5b0beab8ec5c7750ab5225d9200f78f7cbd748fa575fa83e36e1968722bf3a5
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=perfect+square+examples+with+answers'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a link farm and a malicious redirector indicates a probable phishing or malware distribution attempt.

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=perfect+square+examples+with+answers In PDF document text
    • http://files.karenabryantllc.com/uploads/1/3/1/3/131381612/5793414.pdfIn PDF document text
    • http://files.detaillocksmiths.com.au/uploads/1/3/0/7/130776061/7475074.pdfIn PDF document text
    • http://lizinu.singaporenv.com/uploads/1/3/2/6/132682156/visegameve.pdfIn PDF document text
    • http://files.modernwellnesscounseling.com/uploads/1/3/0/7/130738741/jevekaxemovog_xiraduluvul_reraz_guzixodinu.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/1/0431/7180/7381/files/aci_design_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2916/7270/files/40991837036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/pilates_for_beginners_at_home.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0311/6709/files/60565980771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/xepubumazaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6775/8999/files/tusuwogovudekulusirikon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/me_before_you_archive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6543/0431/files/durorafab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/46201283417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/arabic_music_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/52223533724.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 6

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_off00005fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEE 5316 bytes
SHA-256: 15645dd7a4b3fe95e6960b728ce7435d01ba677550b4827490b9c96d7e67de3e
font_01_sfnt_off000071eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EB 15092 bytes
SHA-256: f8b0d3ed83a40cc700b486bf1e07e8da0024b28ee81dda9494f10e59033c6aee
font_02_sfnt_off0000a1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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