Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1123e3b06ec72bd…

MALICIOUS

PDF

39.9 KB Created: 2020-09-01 09:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 742a454a8bc12a1e441108e17ab8d25e SHA-1: 9753106a1950f87bc892e50780633143c688ec97 SHA-256: f1123e3b06ec72bdc3f8400f7e7eb66675ff024bf239fe3ec3619a00e54d75f6
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially garbled, includes text related to tax calculations, suggesting a lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector URL. The presence of a link farm further indicates malicious intent, likely for SEO poisoning or driving traffic to malicious sites.

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.me/wix?keyword=formule+calcul+tva+sur+prix+ttc
    • https://static.usrfiles.com/ugd/b8c837_efc115f8b6fc463bb76a6b95ef7dabdc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d71be1e5321a4eb18819c86c033dffa5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a51c60f2af9e41fd9d725dd92c7091cb.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/fobinaxibesogaxuri.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/21366590468.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4182/files/melogakopazazenewebixu.pdf
    • https://static.usrfiles.com/ugd/b7306e_972a8115943546a68b85ecb48e1683e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_90377477b0904e5ababda945b3dd6dce.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/76409178192.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/rosario_catolico.pdf
    • https://cdn.shopify.com/s/files/1/0430/5377/7047/files/pagipomakufunonev.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_off000057b1.bin
b93302282043a70b2c3eba3b0aacf69760e63d38714e5fcd2045f341604493c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B1 5160 bytes
font_01_sfnt_off00006935.bin
cef6933fe38d43745732005a6aaf211cf589fd673615fdad20dcc7deb08aa36a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6935 12748 bytes

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