Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa35f8149cca2c55…

MALICIOUS

PDF

44.7 KB Created: 2020-08-30 03:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5129264f42bcb4ee38d7042f26274626 SHA-1: 2ff6f16828807b5d4adb5c99d61df1b6914bae92 SHA-256: aa35f8149cca2c55d8ee0e3c461762ccfdd330a0c6c8ae4668d65241b941a809
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to the presence of a link to a known malicious redirector, ttraff.cc. Additionally, the document contains a large number of external PDF links, suggesting a link farm or a mechanism for distributing further malicious content. No scripts were extracted from this sample, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

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=la+metamorfosis+pdf
    • https://static.usrfiles.com/ugd/99afdc_04c499fd50b840d28c82dda3f62e50f6.pdf
    • https://static.usrfiles.com/ugd/d775a9_2126662c142644fd99c104a5fa6ba108.pdf
    • https://static.usrfiles.com/ugd/b8c837_375c03069b3d4bc0bc11542149eb8ceb.pdf
    • https://static.usrfiles.com/ugd/5de1df_18522d91206e40c8b35c2239e1d74ac5.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/all_video_audio_converter_pro_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/8643424148.pdf
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/75837284173.pdf
    • https://cdn.shopify.com/s/files/1/0430/3201/9097/files/rumuxamowam.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/air_cadets_uniform_shoes.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/zeser.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/regebugaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/22395665335.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/
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/zese

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000702c.bin
fa5b1a22edb0d37421a97d4510c6054709c275efd056414be3660b760172bc7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702C 5096 bytes
font_01_sfnt_off00008168.bin
62752b9239962d578d262d548b516976941d14ff6948c7e1f7443c188cfebdfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8168 10788 bytes

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