Malicious PDF — malware analysis report

Static analysis result for SHA-256 996f239c7cd230e5…

MALICIOUS

PDF

47.0 KB Created: 2020-08-17 02:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04db614e8a98c28807aa79b52443a553 SHA-1: d26372db691b48d2fcab572d258ff908942f9858 SHA-256: 996f239c7cd230e54a5827c2b7d33141b281953b2e2ab6f0a403e37ded435837
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link is designed to lure users into clicking it by pretending to offer a 'hack tool'. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. The presence of a 'Password-protected archive handoff' heuristic indicates the document may be a precursor to delivering a password-protected payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=angry+birds+transformers+hack+tool
    • http://files.ywampotch.com/uploads/1/3/2/6/132681488/kajadinuvataxar.pdf
    • http://files.koreanamericanhealthconference.com/uploads/1/3/1/4/131408170/7006120.pdf
    • http://files.rmvwilliams.com/uploads/1/3/1/6/131606284/ridikif.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/fozevodara.pdf
    • https://cdn.shopify.com/s/files/1/0428/7810/7811/files/historia_del_abencerraje_y_la_hermosa_jarifa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/nuregewenupexukawelatine.pdf
    • https://cdn.shopify.com/s/files/1/0444/3491/5495/files/msi_afterburner_free_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/liwavimixubuzaputaxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6148/4437/files/convert_string_to_number_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/36495054750.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/24991054193.pdf
    • https://cdn.shopify.com/s/files/1/0434/5397/2630/files/50283609264.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/xagutejo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5787/1008/files/when_attitudes_become_form_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/peseniwav.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_off000060e5.bin
67e6a1f0e7288ff8e717c31f9c540fb1d2d2427064147f5788851832f0659994
pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 5728 bytes
font_01_sfnt_off0000743f.bin
59937f7eea9b8d191707c3157f9dc4e8d5df1094e8e50743b2f29b5b235a3f51
pdf-font-stream PDF embedded font (sfnt) at offset 0x743F 11164 bytes
font_02_sfnt_off000099e9.bin
301fb2f14aa1e9a5cf8540ebf40f17e8311eb9ba756e1d76589e408feb703965
pdf-font-stream PDF embedded font (sfnt) at offset 0x99E9 16096 bytes