Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac217fab9c77bee0…

MALICIOUS

PDF

41.4 KB Created: 2020-08-10 10:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 828a0100ae6980427aa722eabacb9478 SHA-1: a710510512fe0142d6905ac47eb7beb64ad4fabf SHA-256: ac217fab9c77bee07c5366fb941642996b32f858b1ac21aab494d79d454f9b2a
194 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to appear as academic resources, but the primary link redirects to a known malicious redirector. This suggests a phishing or scam attempt to lure users to malicious infrastructure. The document body contains obfuscated text and a URL that is also present in the heuristics, confirming the malicious redirector. No scripts were extracted from this sample.

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.ru/pify?keyword=wastewater+treatment+and+recycling+nptel+pdf In PDF document text
    • http://files.penandlenscollective.com/uploads/1/3/1/6/131637016/dufidemoxaz_vamixuwuvewiwud_rajelela.pdfIn PDF document text
    • http://files.hightstownmethodist.org/uploads/1/3/1/1/131164386/2326117.pdfIn PDF document text
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdfIn PDF document text
    • http://files.matthewhawkeldridge.com/uploads/1/3/1/3/131383607/nasaniramisibe.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/1/0433/0687/7080/files/12086745869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wirokole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/2423/9003/files/meaning_of_development.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0931/7787/files/payroll_management_system_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/falmer_blood_elixir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/zafopejesukagejasajoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/toluvimujil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/pukunimotufeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/70059796579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/31464235011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2765/9932/files/kujafobikopewito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/monexek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9426/8320/files/lazofi.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_off00005fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB1 5684 bytes
SHA-256: 322667f92809e1d3af3c45f61f350ddefead571b3e1828dd098839059a43581a
font_01_sfnt_off00007319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7319 10884 bytes
SHA-256: 202d5accfa85e3bc3efcefc8d1cc3cefc52ea825ff6a3ce1b467ca2f20caaad5

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