Malicious PDF — malware analysis report

Static analysis result for SHA-256 822b8d7f97d5831e…

MALICIOUS

PDF

35.1 KB Created: 2020-08-31 04:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b85679d5fe0b99b08307b6eb3f74f2df SHA-1: 88bd78e7f8abc14d8f9d783ac7c217d20eaa2d6e SHA-256: 822b8d7f97d5831eb7fe4935f8206df8a6fbf92ed7662e5170614cebef89ee65
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=templo+de+illyn+destiny+2'. Additionally, it exhibits characteristics of a PDF link farm, embedding a large number of external links, with many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking PDF links, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=templo+de+illyn+destiny+2
    • https://static.usrfiles.com/ugd/b8c837_c2b96ae9efea49cda02753a74a29d5b9.pdf
    • https://static.usrfiles.com/ugd/fd3290_bd150b4891ab43cb883abdc38c86eb32.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_811f87d9f624405a91d884108f186fb2.pdf
    • https://static.usrfiles.com/ugd/b8c837_10e29f09fdae409693f8eacb75908e09.pdf
    • https://static.usrfiles.com/ugd/9b33c5_1e5b5c2a99c34abd9902583942762bc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3b7f89ebf664e7781ebe8447bac87b9.pdf
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/aptis_b2_test_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/86284796215.pdf
    • https://cdn.shopify.com/s/files/1/0433/7224/9251/files/auxiliary_verbs_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/33943611723.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/48859604898.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/38120876300.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/86875975118.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/customs_union_russia_belarus_kazakhstan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/nalupofomud.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_off00004c6a.bin
8d45b6cc8a13e4623270736e04dbe43933d6612e96ebfba2efe1dbd6a813d3da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6A 4980 bytes
font_01_sfnt_off00005d5a.bin
0061a48fbb4c410309cd807d7c124653dc2130517926842786822ca918aaff49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5A 10240 bytes

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