Malicious PDF — malware analysis report

Static analysis result for SHA-256 0188f95279c80955…

MALICIOUS

PDF

34.0 KB Created: 2020-08-21 19:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a00c5bfc2bea294e4fba70f516b20873 SHA-1: 237fd00439a4135a0f93235d8868e40458dd6a77 SHA-256: 0188f95279c809551841d035d6b1ad225bacfc441acf689567a15caf337291ce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains a link farm designed to redirect users to potentially malicious content, masquerading as a manual for an Aprilaire thermostat. The primary redirector URL is identified as malicious infrastructure. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt to drive traffic to malicious sites.

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.cc/pify?keyword=aprilaire+thermostat+8476+manual In PDF document text
    • http://files.vancepta.com/uploads/1/3/2/6/132681409/lawuroxel_walikasasizijo_gamane.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/1/0432/9524/4452/files/54498655851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1362/5240/files/sazuzusimijapurose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/runasozitumejumam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/trey_songz_trigga_reloaded_tracklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5507/7781/files/autocad_3d_piping_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7583/5806/files/descargar_catecismo_de_la_iglesia_catlica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/animal_cell_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4305/1937/files/vujefuvemavelikax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7022/5574/files/doenas_de_chagas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/81417935738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/66306610382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/quaternary_structure_of_protein.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 4

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_off0000469a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x469A 5564 bytes
SHA-256: a6357cbe9677adaa023be20188f3b0f926ca0ff12e7dfdc6f6b0470f7fe74ceb
font_01_sfnt_off0000595e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x595E 9568 bytes
SHA-256: 9a5fc21955a0c18cfbe2db09ce28c952cf213da79366649112fd2c072e69b52a

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