Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da2a6f93ca0a4c3…

MALICIOUS

PDF

118.0 KB Created: 2020-08-31 12:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46658808d78e87ac92cb8aad24a1f8c3 SHA-1: 40f5b87be463319b1ad14aa16fe582d9ad59e3f8 SHA-256: 7da2a6f93ca0a4c3099e75e843d9e4fb121756342ca04e1a658cbf7753a79546
120 Risk Score

Malware Insights

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

The PDF was identified as malicious due to its inclusion of a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword search parameter. The document body appears to be heavily obfuscated or corrupted, but the presence of the malicious URL and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic 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.com/wix?keyword=diccionario+de+filosofia+mario+bunge
    • https://cdn.shopify.com/s/files/1/0465/5775/7590/files/endocarditis_guidelines_aha_2015.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/dish_tv_guide_fs1.pdf
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/tigoserozifusero.pdf
    • https://cdn.shopify.com/s/files/1/0430/8952/6951/files/desiigner_panda_mp3_download_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0453/3213/6091/files/biology_notes_for_neet_2020.pdf
    • https://static.usrfiles.com/ugd/e3ff21_22c48247c8c942048f2fedf16b5355ef.pdf
    • https://static.usrfiles.com/ugd/6846fe_5503ca4e785d4bd1bf8bc228e70cdb44.pdf
    • https://static.usrfiles.com/ugd/77d535_6dea7581b8674e1d952def915d5f1c3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e245d0cbf3d46e1b6d4f6411a156c38.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/5382488174.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3816/files/74133218485.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/los_organelos_celulares.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_off00018737.bin
efb0fc41ebe5b7ef7984538bf26834366e011aa259c921c4f745e16b0f1ff3de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18737 5480 bytes
font_01_sfnt_off000199cc.bin
30f938ea7427ce87c1319c184462b045d6a260f2ede772d6ed9ee1ede4d79ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x199CC 15532 bytes

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