Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5acd15e09ade3fb…

MALICIOUS

PDF

36.2 KB Created: 2020-09-01 00:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51c224e324061b400b8b580c15db56bc SHA-1: 5601fdd9ef68bde637d559da3f415079282dbffb SHA-256: b5acd15e09ade3fb1c9895a832a56a4717cd7fa06a6bd73f8c2aa9131f98f35b
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, a technique often used for SEO poisoning or to distribute malicious content. One of these links points to a known malicious redirector at 'https://ttraff.cc/wix?keyword=candara+bold+italic+free'. The presence of a link farm and a malicious redirector strongly suggests an attempt to direct users to harmful 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.cc/wix?keyword=candara+bold+italic+free
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/25645874987.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/serijuvuru.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/ensayo_con_formato_apa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/kimekidalilajasug.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/bullshits_jobs_livre_francais.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0115/files/mololabadilawejopa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/71115928328.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/zezesukidevezakulujuveg.pdf
    • https://cdn.shopify.com/s/files/1/0432/0005/3408/files/gusiwunulilupinofekov.pdf
    • https://static.usrfiles.com/ugd/d1c05f_4b61b87d6f55437b959e09567517e8fd.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_6188868c2544422cb6087d71567b85a6.pdf
    • https://static.usrfiles.com/ugd/26481d_a31896d333d44156b72f6802caf60a6a.pdf
    • https://static.usrfiles.com/ugd/aff7ca_823fa623a6b1451e99bda0da471294b1.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/aiims_recruitment_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8519/files/free_minecraft_cracked_launcher_team_extreme.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/aha_acc_hypertension_guidelines_summary.pdf
    • https://cdn.shopify.com/s/files/1/0428/0346/2303/files/65713501773.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_off000051e9.bin
e7979baeb73d80a708bcdd4e60880e0998623d68e7e4262528d4b424d6bc9502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E9 4884 bytes
font_01_sfnt_off0000628f.bin
43f8b8247ee3cb53ffffa4341b11c277e9f279064c5b14f4fd70ef82647dbecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 9808 bytes

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