Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc3aec4052c2ca8…

MALICIOUS

PDF

86.6 KB Created: 2020-08-19 04:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd8eb0638fd550d858cbd15a8b47fe59 SHA-1: c7cb5dabbffc424804794e7d0863cd6bbb25315c SHA-256: 9fc3aec4052c2ca888fca4a695427fc6439ec7a8948eefc38877d9f897d3d3ce
230 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains multiple heuristics indicating malicious intent, including a critical finding of a malicious redirector link and a PDF link farm. The document body, though partially corrupted, contains the phrase 'General pants returns form' and references 'wkhtmltopdf', suggesting a lure to a fake return form. The presence of a malicious redirector URL and a large number of embedded links, many pointing to Shopify domains, indicates a phishing or scam attempt designed to lead users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=general+pants+returns+form In PDF document text
    • http://xunupizem.steepyourcuriositea.ca/uploads/1/3/1/0/131070374/4275731.pdfIn PDF document text
    • http://files.impunity.site/uploads/1/3/2/6/132681204/lefopogi.pdfIn PDF document text
    • http://pebosena.owenty.com/uploads/1/3/0/8/130873710/86795.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/1/0439/1829/5195/files/jaramigodotodivawizewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/cbse_syllabus_for_class_12_informatics_practices_2020_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/dodunovudof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/22542597882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/amelie_comptine_d_un_autre_t_piano_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/hairdos_for_long_hair_formal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5285/files/rodazebip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/dewowiwawano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3716/2646/files/bna_to_lax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/29980849669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8387/3942/files/javascript_moment_format_month_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/3859/2424/files/human_paleontology.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_off0001163b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163B 5076 bytes
SHA-256: 09107752237d912e3cfeaf6226c37afaceb530a9dff011274accfadc22ff0870
font_01_sfnt_off0001276d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276D 11236 bytes
SHA-256: a0dab57ae4e0970c2df39d9423bcf80203696c8f6f66deade85b620bd6eac95e

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