Malicious PDF — malware analysis report

Static analysis result for SHA-256 788c0ca79c967909…

MALICIOUS

PDF

41.5 KB Created: 2020-08-05 23:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ad83604df95f6dd08f179c7ba67e70d SHA-1: e510342dc49b2c4831bf41450f964881b7e8988c SHA-256: 788c0ca79c9679091f31eea772f67f50a619c3be04dccbc0cfbbf99ce4d81ff2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'advantages and disadvantages of internet for students pdf' and the malicious URL. This suggests a phishing or scam attempt to redirect users to malicious infrastructure.

Heuristics 3

  • 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.
  • 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/pify?keyword=advantages+and+disadvantages+of+internet+for+students+pdf
    • http://files.niassestudios.com/uploads/1/3/0/8/130874318/b919e96e4ba.pdf
    • http://files.korahcvs.com/uploads/1/3/1/1/131163788/guzit.pdf
    • http://files.grayslandhoa.com/uploads/1/3/2/3/132303238/03276.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/6382998632.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nuxekenosagulowagegur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/gusipigabazirufalizev.pdf
    • https://cdn.shopify.com/s/files/1/0434/0187/1512/files/27303722123.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/fovopudabatuxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6002/files/38075880805.pdf
    • https://cdn.shopify.com/s/files/1/0435/3625/3087/files/where_is_ffxiv_log_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/wobikifawezamofesijutix.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2432/files/66259966448.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063e3.bin
c8f814e2f29241fab9a042aab96acd26846ddb75134f52ead7d7f3f5119ebd6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E3 5228 bytes
font_01_sfnt_off000075c7.bin
d338976b3a25da5d78d40dbc8d5d1a3a2c828e58a9e2f7be4b52ed045d602d8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C7 10340 bytes

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