Malicious PDF — malware analysis report

Static analysis result for SHA-256 46283bbc476c4a66…

MALICIOUS

PDF

44.9 KB Created: 2020-08-09 18:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23721bfe01939effe4298e1accbb5dd3 SHA-1: 09ce82f7243ee88aa41ea044b026723be7d9741c SHA-256: 46283bbc476c4a66bbda92542732288a5acfe22b610739cfeb73b846789ceaed
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits a PDF SEO link farm pattern, embedding numerous external links, many of which are hosted on Shopify. The document body itself is heavily obfuscated but contains the same redirector URL. The primary intent appears to be redirecting users to malicious infrastructure through a link farm.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=alex+s+adventures+in+numberland+pdf+archive
    • http://files.drlindagedeon.com/uploads/1/3/1/8/131857970/1103024.pdf
    • http://wisuturiw.yournannyboutique.com/uploads/1/3/1/4/131453574/7e87b7c6e90db76.pdf
    • http://kumanujiw.simonpaine.co/uploads/1/3/0/8/130874359/14c995.pdf
    • http://kanodow.dallasroadkidsclub.com/uploads/1/3/0/8/130874254/6372709.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/blank_calendar_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/nunafavewazelaresewax.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/nofukidifuxedo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/can_you_add_text_to_document.pdf
    • https://cdn.shopify.com/s/files/1/0438/0996/4192/files/35212560258.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/93845373854.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/15263678541.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/fegukakaragupur.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/hashset_time_complexity.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_off00007157.bin
f0c3750d945c98f878656b01bd010209d2fb8ff721cd11f16e6a7392d30cc26d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7157 5652 bytes
font_01_sfnt_off0000846a.bin
6259e52b9161b17ab3f329c9bbc7d1ad2d9c9b9da7c870b1ece96f609fee534b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x846A 9976 bytes

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