Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e222b255ba8d7f…

MALICIOUS

PDF

42.5 KB Created: 2020-08-15 18:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b3f6fea96c838232f2cb16acdc21e35 SHA-1: 793848984fc20fcecfcb6d2ba22a27dac065f3f9 SHA-256: 53e222b255ba8d7f6a62a441d19c340dd973b7dfafee5b1a423726caa8ca0932
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=what+is+total+coliform+bacteria+in+water'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0436/1581/3795/files/56013167311.pdf' being a prominent example. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to lure the user to a potentially harmful site.

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=what+is+total+coliform+bacteria+in+water
    • http://files.housespechomeinspections.com/uploads/1/3/1/8/131857421/fuwibom_japuxovixa_donuvalaxesupor.pdf
    • http://files.brownehillradio.com/uploads/1/3/0/9/130969129/9500774.pdf
    • https://cdn.shopify.com/s/files/1/0436/1581/3795/files/56013167311.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/kafut.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/philips_universal_remote_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5299/8556/files/38486091853.pdf
    • https://cdn.shopify.com/s/files/1/0455/3906/6021/files/11111835903.pdf
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/colloquial_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/97217653060.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/finizuzubokogujamite.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/47744675181.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/93930247289.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_off00006783.bin
ad2baa1069eb9aff79850c193e0f3d73857334b0f75a9538d75819fa43581a1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6783 5368 bytes
font_01_sfnt_off000079b7.bin
5e1f84eb25e067f869c7536aca51f1b83d2252eb36a79a12e5b9031c4cb60b28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B7 10320 bytes

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