Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64d0b6c981974ec…

MALICIOUS

PDF

59.7 KB Created: 2020-08-09 19:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2390ce2d03b35f93be4bc7e03290898 SHA-1: d0874c55089aa02d84ab0bfff12583b1e6e63fea SHA-256: b64d0b6c981974ec07377087ba2c520facd8cb46aac2f36ed641faee345fc67a
162 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.cc/pify?keyword=acknowledgement+template+pdf'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of generated PDF links, suggesting an attempt to manipulate search engine results or distribute content widely. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to copy/paste content into a shell, further indicating a malicious intent to trick the user into executing commands.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=acknowledgement+template+pdf
    • http://files.mtzpbc.org/uploads/1/3/0/9/130969370/bamoduf_jobuseliw_nixadif_suseru.pdf
    • http://files.creesbrothersfarm.com/uploads/1/3/1/3/131381288/c0c8e0bf.pdf
    • http://files.dgvaluations.com.au/uploads/1/3/1/0/131071082/6212540.pdf
    • https://cdn.shopify.com/s/files/1/0430/6911/2474/files/radford_syntactic_theory_and_the_structure_of_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/1193/8216/files/18445392979.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/bise_sukkur_9th_result_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3187/8049/files/cost_accounting_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6599/9511/files/xajobipejugoliduza.pdf
    • https://cdn.shopify.com/s/files/1/0445/3584/0932/files/i_ching_wilhelm.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/arris_modem_port_forwarding.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/sonijupaxexarug.pdf
    • https://cdn.shopify.com/s/files/1/0437/9285/9293/files/72456525032.pdf
    • https://cdn.shopify.com/s/files/1/0430/9408/1687/files/almost_is_never_enough_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/polonafebomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/56087654304.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_off00009b3b.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3B 2828 bytes
font_01_sfnt_off0000a535.bin
3958566b10feab0d36459899ffbb0c626e26f55d5304be4719a91da61b76ec69
pdf-font-stream PDF embedded font (sfnt) at offset 0xA535 5348 bytes
font_02_sfnt_off0000b778.bin
138c8222477bc399e757000e282f71be8f1812b0eb2e8c4841c7f3a01e76b9a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB778 12980 bytes