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)
MD5: 51bdc7ab7270b3b3841fff7fec9fd05d SHA-1: 19cb9e3ec9046c272e52888f9f2eebb1bde617ef SHA-256: 6714b9d2ba434f2a0aa5d9be4b0e3e35df97a224fc219b6b15df94116402c4f8
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector that is flagged as malicious, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Generac manual transfer switch parts', likely a lure to attract clicks. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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
    • http://files.graceisyours.org/uploads/1/3/1/4/131438282/2253546.pdf
    • http://files.bthnm.org/uploads/1/3/1/4/131408062/mifalub.pdf
    • http://files.ichdesigns.com/uploads/1/3/1/6/131606321/vosiziwevarov-xuxep-latufasokonewo-belofir.pdf
    • http://files.firstclasssuccess.com/uploads/1/3/2/7/132740670/4838016.pdf
    • http://files.sylviasenglishonline.org/uploads/1/3/0/8/130874244/2248577.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/gudivizosalefetanumani.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/15537863327.pdf
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/95963343903.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/mogufinotorasamumiraran.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/zatovojojanekazu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/17749261367.pdf
    • https://cdn.shopify.com/s/files/1/0431/8275/1893/files/87940182660.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/mapowuxawuwew.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/40600398483.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/samefuwumaxejupositaje.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/31331552486.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/jafuribukupefodetume.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/zosumomirewipixizifufe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000626e.bin
ff42bb7de8004ec16c3b0af75b090b047dc62688c2b3a2899bac820c313d3127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 5152 bytes
font_01_sfnt_off000073d6.bin
4eb3f7c24155b1e999a30b7e4bca787f40bddcfb8a45076e43e5933e5ae38330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D6 10144 bytes

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