Malicious PDF — malware analysis report

Static analysis result for SHA-256 df71953fa3e6c1a4…

MALICIOUS

PDF

51.3 KB Created: 2020-08-07 14:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: de80dd51f8f83781cfcabce5d0ef6036 SHA-1: 0b883b2f3b2d8c92e80ccce0e35711f092795897 SHA-256: df71953fa3e6c1a42e5bbc5aa868abaebb3f6bfb5fb51659572cc6d21f7892f1
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with a "business plan" keyword. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be a phishing lure disguised as a business document, leading to a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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=agriculture+business+plan+sample+pdf In PDF document text
    • http://files.raingirlphotos.com/uploads/1/3/1/4/131437930/782cc0.pdfIn PDF document text
    • http://files.katieanastas.com/uploads/1/3/1/8/131872087/7b3589b31c.pdfIn PDF document text
    • http://files.klarahomes.co.uk/uploads/1/3/1/6/131607075/32461b1e1c4fd0.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/1/0433/0776/1819/files/visobuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/wowowelifamisolanat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9372/8159/files/tudigovezitexeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/business_english_reading_comprehension_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6227/8809/files/60302451788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/24572842298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/72333427954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/fasazuzezomob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/adobe_photoshop_7._0_tutorial_in_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/nelewovazewafabitusoradi.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 8

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_off000087dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DD 5604 bytes
SHA-256: a5df6c33d791b06b3bfacbce81a6e8d5130b1edcd48ddf0a2c4b9dd5e48a093c
font_01_sfnt_off00009ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD8 10900 bytes
SHA-256: 3bd0bbca05c8d2ee44805b5ff7332f1dd3f289bb371424a0c336a954927c1ea9

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