Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f43b6f2cf11fb83…

MALICIOUS

PDF

49.5 KB Created: 2020-08-02 23:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 613014da4f8483fe3063ba38b4e626d3 SHA-1: 7b647ff5bb8a2baac8d371441c099460a55114a8 SHA-256: 8f43b6f2cf11fb83a7954f6e0f664663fde2f71d46f5fc42431d13d1fb4d3eb4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links points to a known malicious redirector. The document body contains text related to 'cookie clicker' and the authoring application, suggesting a potential lure or obfuscation technique. The primary malicious IOC is the redirector URL, which is likely used to funnel users to further malicious content.

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/pify?keyword=cookie+clicker+import+save
    • http://files.julianoshea.com/uploads/1/3/1/4/131453807/jibumojexoje.pdf
    • http://files.prestigepropertiesph.com/uploads/1/3/0/8/130874163/dutaxumemikib-xomafujixap-lobakulabu-vawim.pdf
    • http://files.nativetales.com/uploads/1/3/0/7/130775942/b90bae542e.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/zinexelunagexuzen.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/mefasirigi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/beketibekoripozenudubileb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/53931529174.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/dupoterugenojor.pdf
    • https://cdn.shopify.com/s/files/1/0439/6302/3518/files/toxabaweninekavi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/mamusonogodapugujuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5309/files/suvonopugilakaligodepijoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7478/9281/files/32084602486.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_off000070c0.bin
32ee17d0cff6b0dc3a469e2abc0210eae058fb87e006a0425d3cf6a0a265fe4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C0 4908 bytes
font_01_sfnt_off00008171.bin
a3f342cfeda331dcf9aa24981b7d51932c79711b15496e52518149a250d6c257		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8171 13396 bytes
font_02_sfnt_off0000ab98.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB98 4324 bytes

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