Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd12cbaed8326bcb…

MALICIOUS

PDF

45.7 KB Created: 2020-08-14 18:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b9831ac13ba31fca3e7b1a880a78207c SHA-1: 0c11aa1ee567eb79af0f05c7b5ac90f4336a48a2 SHA-256: bd12cbaed8326bcb1436675e9d6bf5fb5588aa439368abf99692aaa6d523ac8f
202 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that this URL leads to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of outbound links, with the primary one pointing to a Shopify domain. The document body, though heavily obfuscated, contains the malicious URL and a benign-looking title, likely intended to trick the user into clicking the link. The urgency lure heuristic further supports the social engineering aspect of this attack.

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.
  • 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
  • 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=water+test+positive+for+coliform In PDF document text
    • http://guteso.painandperformancesolutions.org/uploads/1/3/0/9/130969352/5994286.pdfIn PDF document text
    • http://files.mercerjourney.com/uploads/1/3/0/7/130775195/da533.pdfIn PDF document text
    • http://files.nokaloosacert.org/uploads/1/3/1/4/131437627/gazirezesuliwuk_fegawiwudusuvon_vifejunezow_petalim.pdfIn PDF document text
    • http://files.asianhorizonltd.com/uploads/1/3/0/8/130813055/begavap.pdfIn PDF document text
    • http://doxezexin.flattirestudios.com/uploads/1/3/1/4/131438641/c0dc82710c.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/1/0429/2742/3654/files/5984572948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/70922870808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7394/6275/files/rukujemazul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7673/1558/files/terexilepijolumetez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0722/1661/files/qualitative_analysis_of_cations_and_anions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/kegemunelovoguzazewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/55846549107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/naruto_ultimate_ninja_blazing_mod_apk_latest.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D7 5232 bytes
SHA-256: c37a731b286945f5485cb538a728e4e03cb7ace477f54e0d9d1ee408974b7fa4
font_01_sfnt_off0000889f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x889F 9748 bytes
SHA-256: 988215b7325668f9804fdc90097ccf252ea18417520ab0edb501c5d7a0944b9a

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