Malicious PDF — malware analysis report

Static analysis result for SHA-256 396bc311cfd89bbb…

MALICIOUS

PDF

42.9 KB Created: 2020-08-04 18:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b8f3bd5f992465dae4a854b0f563d15 SHA-1: 9e44690cd9a5dd832d6c2a5a140c7d3e81475d0b SHA-256: 396bc311cfd89bbb0638ab3c0f0f021c9e7008380f60514c218dd59126d7c915
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'building construction technology book pdf'. The primary heuristic indicates a malicious redirector link, and the presence of numerous other links suggests a link farm or SEO poisoning attempt to distribute malicious content. The file was generated by wkhtmltopdf, a tool often used to create PDFs from web content, which could be leveraged to package malicious links.

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=building+construction+technology+book+pdf In PDF document text
    • http://files.dvaughnpershing.com/uploads/1/3/2/8/132814166/8ea61b2a.pdfIn PDF document text
    • http://files.usseawolf.com/uploads/1/3/0/7/130739693/4684895.pdfIn PDF document text
    • http://files.stkittswatersafaris.com/uploads/1/3/1/3/131384401/sokupebiker.pdfIn PDF document text
    • http://files.tilliesnevada.com/uploads/1/3/1/3/131379612/xapixivote-pipugu-neruxesivalu-wifuf.pdfIn PDF document text
    • http://files.azkillerbeessoftball.com/uploads/1/3/0/8/130874518/jemizip.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/1/0431/1633/1172/files/65998770320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/tavazotomeruxul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1731/3176/files/tefobizasogupazijinil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6294/3144/files/61197722596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/26409942319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/jugamevudelejodolegagili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/27575296433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6754/7546/files/nabixobujokiroxegaxubodix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/23456795385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0456/7450/files/dogoxasitodire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/sudapex.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 8

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_off00006909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6909 5564 bytes
SHA-256: e46341f918cd80d531622f30f2522a629bfabbf82317d92741a89358e88695ee
font_01_sfnt_off00007c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C07 10208 bytes
SHA-256: 1606bd9023a04a83e08a9ac03336827471c8679de0aff5353f218ead06cdf4bd

Open this report in the interactive analyzer, or submit your own file for analysis.