Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b598b55df64579…

MALICIOUS

PDF

44.7 KB Created: 2020-08-31 12:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b162bcc1b0fa43d34830abfee328e31 SHA-1: 028365d4c644e3f16b7551f9a9466f6cff54b681 SHA-256: 42b598b55df645790145e2361dab159acccb7e1b36edf6d9aa1556b3e92b87ee
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to external PDF files hosted on Shopify. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/wix?keyword=teste+psicotecnico+r1+40+questoes'. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The presence of numerous links and the redirector strongly indicate a phishing or malware distribution attempt.

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=teste+psicotecnico+r1+40+questoes
    • http://cinurl.com/13smx2
    • https://cdn.shopify.com/s/files/1/0447/0394/0762/files/kumujuzuzepipega.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6550/files/amharic_alphabet_writing.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/tebisokebonotusirokake.pdf
    • https://static.usrfiles.com/ugd/9904c2_c04bfe3a125748cf8d20849595eab4a6.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/rigadorazagiwege.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/42447900927.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/99676906308.pdf
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/dobusalulirumepuravab.pdf
    • https://static.usrfiles.com/ugd/ff2e72_56843ab1f7274a87a75ce1d9eed03631.pdf
    • https://static.usrfiles.com/ugd/83e24f_6fbabe85e3da4c1eae9d7532da91e78c.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_off00006f1c.bin
0b298bd34b8bd4ca7093eef34636f86395d63f2e2608471fc477ac7807dc274a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1C 5044 bytes
font_01_sfnt_off00008060.bin
4ec5445d0fc50a8da7dc47ba38eb66db49760999cfe9daf7c6829ed374a01cb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8060 11480 bytes

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