Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6eea1ba5e607824…

MALICIOUS

PDF

42.9 KB Created: 2020-08-13 20:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c7a24b8ce122d7a7236f0c70ec9b7d0 SHA-1: 82d38fa9c9822f773545c1140137fc777350d6b5 SHA-256: b6eea1ba5e6078245259016996d6dc037b298d154b9475cf02039e8a7df1cbc3
120 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with the primary link redirecting to malicious infrastructure at `https://ttraff.cc/wb?keyword=programa%20para%20unir%20pdf%20gratis%20en%20linea`. This indicates a social engineering lure designed to trick users into visiting a potentially harmful site. The document body and metadata suggest it is masquerading as a free PDF merging tool.

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/wb?keyword=programa%20para%20unir%20pdf%20gratis%20en%20linea
    • http://files.christianpoetrybygeoffrey.com/uploads/1/3/0/9/130969300/6023353.pdf
    • http://belimuxi.jeremysony.com/uploads/1/3/1/4/131408027/cb48d0409d5f3b3.pdf
    • http://files.radioramadhan.scot/uploads/1/3/1/3/131378899/rekukovabamerugateso.pdf
    • http://files.ckcondos.com/uploads/1/3/1/3/131383825/lopuvo-fijofuxaruko-nuburejudo-xifuwapojega.pdf
    • http://files.entrustedwealth.com/uploads/1/3/0/8/130814205/difara.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53978683100.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/holy_week_2016_date.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9479/files/nojixozupitus.pdf
    • https://cdn.shopify.com/s/files/1/0435/4660/7765/files/mapokejogizogafe.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2541/files/26062327518.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/82588629946.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8553/files/69057169045.pdf
    • https://cdn.shopify.com/s/files/1/0450/4082/8566/files/introduction_to_computer_security_goodrich_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/linked_list_c_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/greenback_boogie_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/5192/5155/files/67083759129.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_off0000657b.bin
cef4637e79b1980c8120f5940a7dc4189d4602fc22a947dff303a589264771b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657B 5360 bytes
font_01_sfnt_off0000779e.bin
8ad9507e7d69b1af2e49eeadf911ee39272e643f8eedbb76c85b8702854c8154		 pdf-font-stream PDF embedded font (sfnt) at offset 0x779E 11988 bytes

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