Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc6385551506180…

MALICIOUS

PDF

45.3 KB Created: 2020-09-21 19:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a59b33e2a6a7a5f5001d778d47dd04a SHA-1: b6a629fcf80de97c9d4fe7134a69443400943e1f SHA-256: 1bc63855515061807c8df041edc1b09cabb23b8ada0fe6ac4316368f5e16b79d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. One critical heuristic identified a link to a known malicious redirector, and another identified a mass external PDF link farm. The document body contains text related to '4.5 geometry answers' and includes the malicious URLs, suggesting a lure to trick users into clicking on these links, likely for phishing or malware distribution.

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.link/wix?keyword=4.5+geometry+answers In PDF document text
    • http://lidiwetom.pinktuliphotel.com/uploads/1/3/1/4/131438474/5787679.pdfIn PDF document text
    • http://files.daisychainkinsale.com/uploads/1/3/2/6/132683014/11d3004c43282.pdfIn PDF document text
    • http://jemovu.uvtumbling.com/uploads/1/3/1/6/131637814/4004775fb58b.pdfIn PDF document text
    • http://files.sharingthecarecampaign.com/uploads/1/3/0/8/130874524/tirazixatovituxaf.pdfIn PDF document text
    • http://files.gailshortwrites.com/uploads/1/3/0/7/130740297/fdee3a93c7.pdfIn PDF document text
    • http://files.halifaxrealestateblog.net/uploads/1/3/1/4/131437363/dewakofitora.pdfIn PDF document text
    • http://vinanimuv.eltapancocabinetsandmore.com/uploads/1/3/1/4/131437208/jatebatufinisirubi.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/1/0434/8759/2608/files/kakexasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2083/7287/files/advanced_algorithms_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/29103986957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/the_art_of_electronics_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7014/files/clinical_anesthesiology_lange.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/55852451552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/metabolisme_karbohidrat_protein_lema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9548/8680/files/makeup_salon_games_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/celebrations_around_the_world_reading_plus_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5815/1070/files/siwuvonujigaveviv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFD 5316 bytes
SHA-256: 5e5aa44d06ce9279696c60e57003d8fd9457962ba6412a5cf141db6c780311b5
font_01_sfnt_off00006f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1F 10164 bytes
SHA-256: 6f135f57332ac8d139e1b13057b6f226f083a06754c60c7807d75932d648568e
font_02_sfnt_off0000922e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922E 16072 bytes
SHA-256: 4ce97752c8d1ed0b0302a1507788019c6b738cc3ee96ca273f61f92c287db7cd