Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f606f99d46c88d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-20 20:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 555a6b71b13e67b5be47405c1a55ea12 SHA-1: 04ef58219f6eb9755065242be50375f5978648cd SHA-256: e8f606f99d46c88d960042e9922b22ce549fd0fa9aa3e9ba1b59723cf025f773
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as information about a 'Hunter college physical therapy information session'. This URL is part of a link farm, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same lure text and the malicious URL. The PDF was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

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=hunter+college+physical+therapy+information+session In PDF document text
    • http://files.turnerlaboratory.org/uploads/1/3/1/4/131453989/fatatag-pulakariv-labutu.pdfIn PDF document text
    • http://romapotur.fusionenrichment.com/uploads/1/3/1/4/131406082/fuxiwikevupegigo.pdfIn PDF document text
    • http://kiwopox.northenddeli.com/uploads/1/3/1/4/131438379/dujaki.pdfIn PDF document text
    • http://jopodew.dulcineaquartet.com/uploads/1/3/1/4/131408071/31561b339bcad.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/1/0435/6331/9445/files/anterior_tibial_tendonitis_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/32385036863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7794/0886/files/19569520586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4456/0281/files/rezuzidutasadogujumil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/mexagizifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/yield_curve_theories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/sanomos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/hssc_declaration_form_annexure_e1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2808/5911/files/calendario_rusia_2020_hora_colombiana.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_off00006436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6436 5492 bytes
SHA-256: 1a233a2fcd57dffd2466867970b4b78bf94f8ceffc045b7a7fdfbb433669f673
font_01_sfnt_off000076c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C2 10616 bytes
SHA-256: 95c0643beeb2de862401a5b31e619f733bc3b68fecef0435a9c1b736fa3b0c45

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