Malicious PDF — malware analysis report

Static analysis result for SHA-256 7237c0bac973b2e9…

MALICIOUS

PDF

40.5 KB Created: 2020-08-12 02:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cc879ca2a81d9a88d9ecefdd82cd4e7 SHA-1: 77ed5c496f08af84050bc5cc707cd25eb40940d6 SHA-256: 7237c0bac973b2e97bf0998e6ae479ae05e9d96b7373b50503af3577cf05a234
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a URL designed to appear as a download for 'ableword pdf editor free download'. The document also contains a large number of external PDF links, suggesting a link farm intended to manipulate search engine results or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious download lure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=ableword+pdf+editor+free+download
    • http://files.davidmichaeldesign.com/uploads/1/3/1/6/131636766/3ab714.pdf
    • http://files.londonderrychristianmontessori.com/uploads/1/3/1/1/131163747/1987567.pdf
    • http://files.palestinepublishing.com/uploads/1/3/2/6/132695372/nazutil_fakolazamov_rasibidu_kujiviwibabijuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/diagnostico_institucional_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0435/3199/3242/files/bufubaram.pdf
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/engineering_circuit_analysis_9th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/jozowitekovatow.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/gegapesu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/cambridge_igcse_additional_mathematics_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/8532/3683/files/79943541471.pdf
    • https://cdn.shopify.com/s/files/1/0439/3736/6174/files/broken_wing_butterfly.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/isda_master_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/98648821598.pdf
    • https://cdn.shopify.com/s/files/1/0431/5961/7690/files/38805043973.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/62056306253.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/98901111741.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_off000060b4.bin
d0f3845b28e1dbecb4f65e089acba4e710aa7df5319668cdadc7e78ad488459a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B4 5080 bytes
font_01_sfnt_off00007212.bin
1b4dc5d2d879ea685fffb45cef8598e7957afda3e4d6f1e413ed03c293560df5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7212 10224 bytes

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