Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3abbbdc46446179…

MALICIOUS

PDF

39.4 KB Created: 2020-08-24 19:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c738f28b5afee2e9659bc6156019bcea SHA-1: 9c4d786c773c3a56a02192a604fcf77c2e73b6a0 SHA-256: e3abbbdc4644617937f22d4528178ce48eb084fc606e65c92b0af26601bb8b19
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains the text 'Very hungry caterpillar coloring pages free' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm tactic to distribute the malicious redirector.

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.cc/pify?keyword=very+hungry+caterpillar+coloring+pages+free
    • http://files.edgertoncentermakerspace.com/uploads/1/3/2/6/132681479/5332072.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/76524689131.pdf
    • https://cdn.shopify.com/s/files/1/0438/0105/1293/files/9693534851.pdf
    • https://cdn.shopify.com/s/files/1/0438/2595/4973/files/hily_app_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/argument_essay_graphic_organizer.pdf
    • https://cdn.shopify.com/s/files/1/0441/1277/3272/files/libajaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/zuvorulivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/16574816066.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/28207648257.pdf
    • https://cdn.shopify.com/s/files/1/0429/3672/9766/files/podalugusujem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ec6.bin
b2ad353174c82ca5428076c5c6bfe863edf2eccc51bd509bf7336526f0d850fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC6 5224 bytes
font_01_sfnt_off00006088.bin
fbcb1a34f5d2129f47c95951dc3fe93eaad0e3f46df23c0a619e0fb4a86908be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6088 10044 bytes
font_02_sfnt_off000082bd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BD 4324 bytes

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