Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84c05115abcf4bc…

MALICIOUS

PDF

52.9 KB Created: 2020-09-02 01:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59f8af4294747fa26e84e90975a28767 SHA-1: 4876329d73ece04ffe460650aba0e73556095aad SHA-256: f84c05115abcf4bca78642b99dbcb9662882f292e660a53c4b2ab0d5685bea80
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is the primary attack vector. The document body, though heavily obfuscated, contains text related to an 'online application form' and includes the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely to improve search engine ranking for malicious lures.

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.link/wix?keyword=asrb+net+2018+online+application+form
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70745323757.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/mivusixelalulajolenop.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9320/files/1426363355.pdf
    • https://cdn.shopify.com/s/files/1/0435/7911/3635/files/brondell_swash_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/47831741442.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/xusufinejafam.pdf
    • https://cdn.shopify.com/s/files/1/0437/0333/7115/files/13243444646.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/62775537808.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce0492239dc14be7ba85c600cdf4dae1.pdf
    • https://static.usrfiles.com/ugd/b8c837_8721ec39ed8242659ef8b3856c7e077f.pdf
    • https://static.usrfiles.com/ugd/f3cb45_c6710561c4db486297012035af622c58.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/zijemewuwilasokoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/tujovolotegaga.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_off00007a11.bin
c9c96f50a7132b64918e5872df289b2dd2e9dd66337c0a0fbd12af4265d67898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A11 5808 bytes
font_01_sfnt_off00008dca.bin
03b3744c9631c03bbe5934ef2aa8698ad9d64c330f2990bf1a647af1d5899b29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCA 10540 bytes
font_02_sfnt_off0000b1c8.bin
fb27248ec02d804caa0ce6a8dd06a8f0f211157336bc50f6c382585ff5fe3da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C8 16084 bytes

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