Malicious PDF — malware analysis report

Static analysis result for SHA-256 900d2fb7a1ab2d70…

MALICIOUS

PDF

42.1 KB Created: 2020-08-19 06:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5db35a7a73c1ebb9c1d0abc2d5584cfa SHA-1: 188a1a6f49b54852579120570071b48df0931214 SHA-256: 900d2fb7a1ab2d706071842b828afe99ceed77877994715cdb47bea900db74bd
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, disguised with text suggesting a performance self-evaluation sample. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The primary malicious URL is https://ttraff.cc/pify?keyword=performance+self+evaluation+comments+sample, which is flagged as a malicious redirector. The document body itself is heavily obfuscated but contains the malicious URL and several other URLs, some of which are confirmed benign.

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/pify?keyword=performance+self+evaluation+comments+sample
    • http://files.cvillechambermusic.org/uploads/1/3/1/4/131483371/fedupujunoredo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/gobowozofimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/39681901790.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/a_level_computer_science_9608_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/difference_between_active_and_passive_components_in_electronics.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/basic_financial_accounting_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/38519734327.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/93412878341.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/wulakomizevobu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/kifekutorirugolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0826/files/88584341298.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/sql_developer_formatter_not_working.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_off0000679a.bin
322bc06c475b784ccb64f40f2a1530e5d54eb59823bba948cd073e3d3855bb7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679A 5220 bytes
font_01_sfnt_off0000794a.bin
cc0b9b882deb5fd6968ed2eaa2b4191a8aa34ffde75d9dbcde43baefb5516a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x794A 10060 bytes

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