Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0741ab5f0b864a9…

MALICIOUS

PDF

55.2 KB Created: 2020-09-12 03:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b671daa1f790ef0e1537eecb93e1abc SHA-1: 69be3b27fe55270f1342fb762815cb38846b621c SHA-256: a0741ab5f0b864a92513d2c5efae1086328e8735539884961cdd3482dbf6bbf3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=urticaria+multiforme+fever'. The document body, though heavily obfuscated, contains this same URL, suggesting the document's purpose is to trick the user into visiting this malicious site. The PDF also contains a large number of embedded links, many of which point to Shopify domains, likely as part of an SEO link farm to disguise the malicious redirector.

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=urticaria+multiforme+fever
    • https://cdn.shopify.com/s/files/1/0437/2663/5157/files/scenario_interview_questions_for_administrative_assistant.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/partition_comptine_d_un_autre_t_p.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/94821952619.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/riniripuronidobun.pdf
    • https://cdn.shopify.com/s/files/1/0463/1481/5648/files/blob_not_working_in_firefox.pdf
    • https://cdn.shopify.com/s/files/1/0428/2253/3276/files/94387985782.pdf
    • https://cdn.shopify.com/s/files/1/0437/3987/3429/files/nufeparasa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/fevosapesiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/numorunaxesiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2266/4348/files/printable_impulse_control_worksheets.pdf
    • https://static.usrfiles.com/ugd/bd5c68_333b02d8a7ae45db91efe20c6f745aec.pdf
    • https://static.usrfiles.com/ugd/bf650e_2c65ec81c2e54ba481c5bc24f31745ed.pdf
    • https://static.usrfiles.com/ugd/b1b16e_562bc83d32cd4b1cb0823c6e144b2418.pdf
    • https://static.usrfiles.com/ugd/4725f1_2cc8e09e134c44e895de513326db1e1e.pdf
    • https://static.usrfiles.com/ugd/48d9a1_c6b3fdceb18f44f0b7fc5fbb127aec91.pdf
    • https://static.usrfiles.com/ugd/e4f6f0_a43ed36abbe445dc800cda8985413f5a.pdf
    • https://static.usrfiles.com/ugd/5af86b_32f5dbabc41046c6a998aac6fb3feb3c.pdf
    • https://static.usrfiles.com/ugd/078c79_bdd3cea48b364c93ac72e6f46fe7b6b7.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_off00009ac9.bin
01f8f64245aab8238118e30c78b813d8e0b18c6829caaeeb044b21a334c07850
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC9 4900 bytes
font_01_sfnt_off0000ab6d.bin
ea304ae986a0951d9e4b84c36d43cdcbf91b3bc3022ac032d640065191fa2382
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB6D 10924 bytes