Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd53b4c0931029fc…

MALICIOUS

PDF

37.7 KB Created: 2020-08-31 20:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3662489b3b2551d28e6522520eec02e5 SHA-1: 9b11930a0ad87afb8d65e8704fb48d8786d29d50 SHA-256: bd53b4c0931029fc30e205d40bcf7ae11473c36945cd62ebdc5b817af68226f2
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as educational material. The document body, though heavily obfuscated, contains URLs that are part of a link farm, with one specific URL pointing to a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or to download further malware. The presence of numerous external PDF links further supports a link farm or SEO poisoning tactic.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=guide+efficace+de+l%2527+enseignement+des+math%25C3%25A9matiques
    • https://static.usrfiles.com/ugd/b8c837_43cdedc5c9ef437aaec158e14bc2b1c2.pdf
    • https://static.usrfiles.com/ugd/122077_2972be6bcc9b435cbd73026f7c551f7f.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_206e8fbb45824fd2bdaf43afce0d3864.pdf
    • https://static.usrfiles.com/ugd/b8c837_afe367ecf4234bd88a9debb35fa7dd6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_39b70d8bed95487c88a558d717dc91f5.pdf
    • https://static.usrfiles.com/ugd/f103bb_ba7bf49dc51d4edd9fd04dcfdc6f05a5.pdf
    • https://static.usrfiles.com/ugd/221f3a_4d2dbb9236584521851990e7d57dec88.pdf
    • https://static.usrfiles.com/ugd/ae059d_3107c856fa344625a7bc7134e3885210.pdf
    • https://static.usrfiles.com/ugd/57c819_37bbee45a94c4c70b3279df71c815d6c.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/xovoletixiwafiwig.pdf
    • https://cdn.shopify.com/s/files/1/0433/7873/7302/files/fivemovem.pdf
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/32723791316.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/honda_eu2000i_spec_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/what_is_simplest_form_in_math.pdf
    • https://cdn.shopify.com/s/files/1/0439/7711/3758/files/atmospheric_layers_worksheet_answer_key.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_off00004fb7.bin
44f4d8e2c6959d52dd313a9d9ee8ead193b2ed055edf141368e67a476719eec9
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB7 5672 bytes
font_01_sfnt_off0000629e.bin
59df90b198f4eba40cdbdaa5bd86ba873c07267c10a44c9499402ed2fa2a9906
pdf-font-stream PDF embedded font (sfnt) at offset 0x629E 11292 bytes