Malicious PDF — malware analysis report

Static analysis result for SHA-256 e138d1e2c24a8044…

MALICIOUS

PDF

43.8 KB Created: 2020-09-01 03:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 689f99971540b289107a4bd9bc1e04fc SHA-1: 672d05df2d9caed0fe4ff120ae3ee41847366343 SHA-256: e138d1e2c24a8044c4b5e6d26443e7a87edf491b837fc1a71c502b92813b9344
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=communication+skills+in+business+management+pdf'. This URL is presented within the document body, suggesting a social engineering lure. The file also contains a large number of embedded links, many of which point to benign content, but the primary redirector is flagged as malicious. No scripts were extracted from this sample.

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.cc/wix?keyword=communication+skills+in+business+management+pdf
    • https://static.usrfiles.com/ugd/b8c837_14528a42e0e348f6a6ba60112970bfb4.pdf
    • https://static.usrfiles.com/ugd/c75f60_fc4906debcf84cce8d1221b03c3e8285.pdf
    • https://static.usrfiles.com/ugd/5899d5_68953a4de6a846fe8c7764bb03e5aec5.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_3425b2548f2c415cbd826c6fbe59eba9.pdf
    • https://static.usrfiles.com/ugd/a474dd_dd9573c643a14ca88486a68cf9249a0c.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/natoxixaviselikodaduta.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/bsc_mathematics_syllabus_madras_university.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/esl_body_parts_worksheet_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/85409672297.pdf
    • https://cdn.shopify.com/s/files/1/0439/1629/6360/files/principles_of_economics_asarta_butters.pdf
    • https://cdn.shopify.com/s/files/1/0462/5052/4823/files/most_important_full_forms_for_competitive_exams.pdf
    • https://cdn.shopify.com/s/files/1/0432/1565/0980/files/34600348937.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/tipoxizamulurogoj.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_off00006ca5.bin
25bf767117d8d157466ab2d6054ae5eba8ddb4d9365a616cc012089c18a5d8c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA5 5488 bytes
font_01_sfnt_off00007f3f.bin
2c5d8ba05bb07bf4cad9975268c97309f4521cf62231578695b15b82a6e88d27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3F 10196 bytes

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