Malicious PDF — malware analysis report

Static analysis result for SHA-256 8088bae45b1fbf93…

MALICIOUS

PDF

43.4 KB Created: 2020-09-17 00:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04086c2ebe28146dccd7b2483c660a30 SHA-1: 5e55155186a7e15591454cb063cac2276c2b911b SHA-256: 8088bae45b1fbf935c26f4af8765fc475845fe5a55d259b9998d9d9ced754d8c
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.cc/wix?keyword=dc+unchained+guide', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a link farm or SEO spam tactic.

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/wix?keyword=dc+unchained+guide
    • https://cdn.shopify.com/s/files/1/0429/8063/8879/files/functions_of_computer_keyboard_keys.pdf
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/6533054478.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0028/files/playing_cards_games_bridge_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/94245809936.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/ketoasidosis_diabetik_anak.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4812/files/faststone_capture_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9489/files/69835324860.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/rukmini_swayamvar_book_in_english.pdf
    • https://448ca009-418c-45c4-b183-4d35d22ca5d6.filesusr.com/ugd/c1108c_ff89217464bd482ab667357cb3ed90dc.pdf?index=true
    • https://b77bd33b-6ab1-4856-90ab-544d22691bf6.filesusr.com/ugd/6924eb_ad66d63461f343d29b16d2d9fa4296ef.pdf?index=true
    • https://fde60da7-732e-4475-9d31-9b82f63356e0.filesusr.com/ugd/8a9bcc_85a95f0d5eed4d97ba62d2a9c0b68ea8.pdf?index=true
    • https://154544c7-2730-4c8c-87c0-4c8be40dcf9d.filesusr.com/ugd/a2ebd8_a3c55d82da3a414f9010c1792779295b.pdf?index=true
    • https://894fa86e-8814-4906-967b-44bee082fb33.filesusr.com/ugd/1acd69_e94def700fa741e98ae03284f90136de.pdf?index=true
    • https://06e89dc1-5b57-4e53-baf3-f74bb1a3b053.filesusr.com/ugd/a32c20_8b40c3c0f6474f31acfe57209aa9496d.pdf?index=true
    • https://8276aa87-bb0c-4af6-b6f2-5e00547f6f5c.filesusr.com/ugd/fe83c3_79232324e3c84c3db10a4591c7e6cc0b.pdf?index=true
    • https://33ec3420-ab41-4c48-95e6-6ce9ce8f8e6e.filesusr.com/ugd/fbccce_8b9e0f2064134ced88bada2ef9db3117.pdf?index=true
    • https://7681f8cb-6432-4883-8bce-3f23cad3e375.filesusr.com/ugd/8a4248_dacbefef80144c28a62fbf3d404f35d7.pdf?index=true
    • 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/
    • https://154544c7-2730-4c8c-87c0-4c8be40dcf9d.filesusr.com/ugd/a2ebd8_a

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c13.bin
54898c534c065d2411b729bb72ed0a369adfb5f24106d22d11d9bf6838603cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C13 4892 bytes
font_01_sfnt_off00007cc2.bin
d949afc1f204e0cda47cda87195c79d6d16df52d220a2d027a021d67c7adbc05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC2 10408 bytes

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