Malicious PDF — malware analysis report

Static analysis result for SHA-256 771da7456bd3a5ca…

MALICIOUS

PDF

34.6 KB Created: 2020-08-05 10:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d5a2e3fdfff539e3ab403c2c67c6740 SHA-1: 525456a877158b9d59a10b99d7fbcb67e486e259 SHA-256: 771da7456bd3a5cab40afbbe373176f0370bd17762d8c7929c649860a769dada
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded links likely serve to direct users to phishing pages or download further malicious content, masquerading as legitimate documents.

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=acupressure+points+download+pdf
    • http://files.teacheronclimatestrike.com/uploads/1/3/0/7/130775361/vupebagoxesuzon-vibimilatuli-zonadisuzebili-refuvobijapuda.pdf
    • http://files.hhinthegarden.org/uploads/1/3/0/7/130776131/1872416.pdf
    • http://files.abigaildennistonphotography.com/uploads/1/3/1/3/131379689/dugonelozel.pdf
    • http://files.hsisign.com/uploads/1/3/1/4/131406835/888488.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/30042516428.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/xezaworegexitomoxesoli.pdf
    • https://cdn.shopify.com/s/files/1/0435/8111/2483/files/49833045434.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/28441388901.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/19321440854.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/sodes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82973104521.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/87507682658.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/75998644237.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6013/files/xufafuzevejofuke.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/debut_video_capture_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/vosopi.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_off00004b3c.bin
39a7fc50107df27f5bdcf8804daca2288c5b343d3bb11e7178917c9485db3883		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3C 5228 bytes
font_01_sfnt_off00005d29.bin
bf5223c718eb5bcb39feddf69db55312920be347aa7620852be0193ab69e153b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D29 9504 bytes

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