Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bdb27275ed09e54…

MALICIOUS

PDF

56.6 KB Created: 2020-09-09 21:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01182f4b0ba0b25a277383169c651e3c SHA-1: 2035422ac677e14669761fa95bc9a6659c2dbb68 SHA-256: 4bdb27275ed09e540a639ea89b51bbb084ab84ff8a52ff4d764a8bd9f8f4b3f4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/wb?keyword=enfermedad%20de%20hirschsprung%20pediatria%20pdf%202017'. The document body, though heavily obfuscated, also contains this URL and numerous other links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be redirecting users to malicious infrastructure.

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.cc/wb?keyword=enfermedad%20de%20hirschsprung%20pediatria%20pdf%202017
    • https://cdn.shopify.com/s/files/1/0447/6072/7703/files/gcic_report_fulton_county.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/44015015262.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/rexovonanapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/tezawunonizilosefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0827/8171/files/suxipufazisunulorojuruzoz.pdf
    • https://static.usrfiles.com/ugd/911c12_8bb0678dc8b440429c941bae3bdf9f6f.pdf
    • https://static.usrfiles.com/ugd/485053_77ac08e563a84064b8d8d5c8cab4e890.pdf
    • https://static.usrfiles.com/ugd/5a1791_df59da361cee4ed39ce032af10c951e5.pdf
    • https://static.usrfiles.com/ugd/cd79e3_5aab41887adc4fa7b95b21dfc84e3b88.pdf
    • https://static.usrfiles.com/ugd/98d33d_75bf0e1eac6248728eb5675dd73b4c02.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/65341728610.pdf
    • https://cdn.shopify.com/s/files/1/0438/9978/1288/files/bible_catholic_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/tevujizedadurewimigejuse.pdf
    • https://cdn.shopify.com/s/files/1/0433/7395/3187/files/time_value_of_money_solved_problems.pdf
    • https://cdn.shopify.com/s/files/1/0450/0019/6264/files/43665734243.pdf
    • https://cdn.shopify.com/s/files/1/0432/1191/5421/files/brc_full_form_in_english.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000918d.bin
5ced37dd1ce7b158e9c3cf96caa8ecc8ea14cf56ec51be621346c993725cafb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x918D 5672 bytes
font_01_sfnt_off0000a4b2.bin
582dc9cb20bf344576ccfeabd2900ca50af0c747ead321f92312c77d61c17f9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B2 10096 bytes
font_02_sfnt_off0000c72e.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC72E 4324 bytes