Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9183a4844d8d676…

MALICIOUS

PDF

43.9 KB Created: 2020-08-19 00:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e323246704f0bbca75e2186bebfd13e2 SHA-1: b6ceea2fe6d7fa8597dc38e9db1b88b566eb3a0e SHA-256: b9183a4844d8d676842cb4460267dc5b37ca958b43c8c34150794127f45ffc88
234 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to host malicious content. One critical heuristic identified a link to a known malicious redirector. The presence of a 'Visible LOLBin command execution instruction' heuristic suggests that the document may also contain embedded commands or scripts intended to execute malicious code, though no specific script content was extracted. The primary attack vector appears to be directing users to malicious infrastructure.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.cc/pify?keyword=jspdf+auto+table+cdn In PDF document text
    • http://files.dominicmartinez.com/uploads/1/3/1/1/131163687/pavimokivaton-guguwezobiluf.pdfIn PDF document text
    • http://files.gcmdazzlers.com/uploads/1/3/2/6/132695361/xogikawi_sefujobavoku.pdfIn PDF document text
    • http://files.hotstuffnmore.com/uploads/1/3/0/8/130814043/daguvirexof.pdfIn macro / runtime command snippet
    • http://zupoguje.mekicartgallery.com/uploads/1/3/0/8/130813945/9530648.pdfIn macro / runtime command snippet
    • http://files.bluecreekcanine.com/uploads/1/3/0/7/130776535/sobejeretos_medaxapuxeg.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/1/0430/6350/9141/files/all_my_loving_ukulele_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/nys_notary_public_practice_exam_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/lerubolexiwip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/6263/5168/files/endometritis_tratamiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3495/0304/files/fuxij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/jutejumigepetiwebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/xonegewijoruzakewaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/nemuzugizetamujenovip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/87409399416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4736/2453/files/conjunctive_normal_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1454/4808/files/gotosozenevubos.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000639f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639F 5184 bytes
SHA-256: 80fcd8952ff55d194f0ccccc6ee0859379e4dad4af057b08c0989bc6fcb78fd2
font_01_sfnt_off0000754f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 14564 bytes
SHA-256: 6880414b6785ba515311882971f2c101a739e52baa4b3aeeed4f7830f07e92ba