Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b1a6de87f92e01…

MALICIOUS

PDF

44.6 KB Created: 2020-08-12 20:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a03e26784650c4fc59874fdccee26188 SHA-1: 78fee96be1e3945293449dc07ad99955c9f9803a SHA-256: 99b1a6de87f92e01ea96bd6353c23241c8857f6434999c49b0193c0630eec327
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=buccal+tablets+pdf'. It also exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the target URL and references 'wkhtmltopdf', suggesting it was generated programmatically to host these links. The primary intent appears to be directing users to malicious sites under the guise of providing PDF 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=buccal+tablets+pdf In PDF document text
    • http://files.holmeschan.com/uploads/1/3/2/3/132302999/617a485c44018f.pdfIn PDF document text
    • http://files.centralwestmorelandsu.org/uploads/1/3/1/3/131398504/feremiroliv-kepesaguk-bigeni.pdfIn PDF document text
    • http://files.lash-lab.com/uploads/1/3/1/4/131406173/653cac.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/1/0429/5183/5801/files/jujodovekojelezaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4870/4920/files/godufatigakoxakipad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7355/8935/files/vocabulary_for_ielts_collins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7014/4158/files/zudijesilej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/the_addams_family_musical_score.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/79047965996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/lamokinegujivemudenubam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3547/6646/files/excel_assignments_for_college_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/zetukamipetuwabajotado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/apc_back-_ups_xs_1000_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/xevizunaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/jobcentre_plus_travel_discount_card_application_form.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_off00006e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7C 5244 bytes
SHA-256: 5faf3cd832f748fbf76ad89ff113952c2f737827f7845631048da63bd02b0a00
font_01_sfnt_off00008059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8059 11428 bytes
SHA-256: aaf7f63e766d63dba174cfacc2f7ea88029c336b5743703a925aa90754cf13e7

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