Malicious PDF — malware analysis report

Static analysis result for SHA-256 6714b9d2ba434f2a…

MALICIOUS

PDF

41.0 KB Created: 2020-07-29 17:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 51bdc7ab7270b3b3841fff7fec9fd05d SHA-1: 19cb9e3ec9046c272e52888f9f2eebb1bde617ef SHA-256: 6714b9d2ba434f2a0aa5d9be4b0e3e35df97a224fc219b6b15df94116402c4f8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically a redirector farm designed for SEO phishing. The document body, though heavily obfuscated, appears to be a lure related to 'Generac manual transfer switch parts'. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests an attempt to distribute further malicious content or phish for credentials.

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/wb?keyword=generac%20manual%20transfer%20switch%20parts In PDF document text
    • http://files.graceisyours.org/uploads/1/3/1/4/131438282/2253546.pdfIn PDF document text
    • http://files.bthnm.org/uploads/1/3/1/4/131408062/mifalub.pdfIn PDF document text
    • http://files.ichdesigns.com/uploads/1/3/1/6/131606321/vosiziwevarov-xuxep-latufasokonewo-belofir.pdfIn PDF document text
    • http://files.firstclasssuccess.com/uploads/1/3/2/7/132740670/4838016.pdfIn PDF document text
    • http://files.sylviasenglishonline.org/uploads/1/3/0/8/130874244/2248577.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/1/0435/1302/0570/files/gudivizosalefetanumani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/15537863327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/95963343903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/mogufinotorasamumiraran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/zatovojojanekazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/17749261367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8275/1893/files/87940182660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/mapowuxawuwew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/40600398483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/samefuwumaxejupositaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/31331552486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/jafuribukupefodetume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/zosumomirewipixizifufe.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_off0000626e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 5152 bytes
SHA-256: ff42bb7de8004ec16c3b0af75b090b047dc62688c2b3a2899bac820c313d3127
font_01_sfnt_off000073d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D6 10144 bytes
SHA-256: 4eb3f7c24155b1e999a30b7e4bca787f40bddcfb8a45076e43e5933e5ae38330

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