Malicious PDF — malware analysis report

Static analysis result for SHA-256 156d6320cd601996…

MALICIOUS

PDF

33.5 KB Created: 2020-08-01 23:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfeb91a9fb405de9f784b090825ffeae SHA-1: f8fc640fe5ed2d293a1f5d9dba7a6e4a4aeab1e1 SHA-256: 156d6320cd601996312e67ee58cf3cf3f2acc12711552b184460a73a47fd54af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.com/pify?keyword=wow+classic+turtle+scale'. Additionally, it exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for users interested in 'wow classic turtle scale'.

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.com/pify?keyword=wow+classic+turtle+scale
    • http://files.sweetpeafloralcreations.com/uploads/1/3/0/7/130739120/7664411.pdf
    • http://files.ellendonaldson.com/uploads/1/3/0/7/130775001/a43045bc.pdf
    • http://files.andreafarmeraprnllc.com/uploads/1/3/0/7/130776536/25f93e2f2e.pdf
    • http://files.heislercommunications.com/uploads/1/3/0/8/130815014/tutal-tupivalaw-guriwilegonija-tamidubod.pdf
    • http://files.northernmichiganlivestock.com/uploads/1/3/0/7/130738836/kawafewafijura-xokadeser-zewufajaremol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7659/7400/files/66427750501.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/73074884094.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/1233174033.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5085/files/saxivubezirorixusobet.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/xojutubazudiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/29887925408.pdf
    • https://cdn.shopify.com/s/files/1/0440/9131/0232/files/rubinuguwatopame.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1568204463.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/parita.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/sklearn_logistic_regression.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7725/files/jozem.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_off00004743.bin
83bb11cb9e849f13d271c3d91dd1e80046ba36c664fb3b04c397a412c1e80e1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4743 4900 bytes
font_01_sfnt_off00005810.bin
af2ba27f8ebf3fbd5446e2f6aa352b5248165ddeb18d7b77ce6d44a39c542f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5810 9804 bytes

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