Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc6027bca3cb2f6…

MALICIOUS

PDF

38.4 KB Created: 2020-08-30 23:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60c87bd13ad282e84b4a1f986e297c22 SHA-1: 66bdaf03eb25f599708461d6eee87842fa73b3c1 SHA-256: 9bc6027bca3cb2f62616bfa6ec6ef4945823b8d64d3dd81dab822914597c9156
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at `ttraff.ru`. The document body, though heavily obfuscated, contains the same theme as the malicious URL, suggesting a lure to a malicious site.

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/wix?keyword=burning+house+cam+sheet+music
    • https://static.usrfiles.com/ugd/15cd4d_e7a76c706c484ddf9e37847822075678.pdf
    • https://static.usrfiles.com/ugd/67e251_6e630c26886d45b0ae4524674324840b.pdf
    • https://static.usrfiles.com/ugd/21e6f2_4ef6c1bf5c29431fb3e439fc5204dfba.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/57468915544.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9903/files/tom_welling_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/merge_sheet_in_excel_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/las_reformas_borbonicas_medidas_sociales.pdf
    • https://cdn.shopify.com/s/files/1/0465/4956/5590/files/surevetigivutilopawigevi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/gagiratigaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/bujetomimanulidekem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/xozerovokenototupijesinav.pdf
    • https://cdn.shopify.com/s/files/1/0434/1602/7303/files/geometric_tools_for_computer_graphics.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/360_degree_antivirus_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/breasted_history_of_egypt.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/41279828726.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_off00005718.bin
cd838ba266607eddfc727537657a72531c78be0cd316df91054718c0cdb4917a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5718 5228 bytes
font_01_sfnt_off000068ae.bin
5e1862b77737c0826c9e6151b0ba622d9834db3f3d55096bfb167444ad166ac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AE 10800 bytes

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