Malicious PDF — malware analysis report

Static analysis result for SHA-256 eade8ec26b1fd5af…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 09:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d5d91dee04b38be60c85827479e6d67 SHA-1: 1a0356473f9bb1e5cbef68382dff4736c104cc8b SHA-256: eade8ec26b1fd5af657ad6d44fa4fbcaca14cb358d72c97228f6fefb1d3866c6
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=campbell+orthopaedics+pdf+free+download'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to 'static.usrfiles.com'. The document body, though partially corrupted, contains text related to a free download, suggesting a social engineering lure to encourage link clicks.

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=campbell+orthopaedics+pdf+free+download
    • https://static.usrfiles.com/ugd/3f0e57_19ed01b4c13648aeb545b019fb7eddfc.pdf
    • https://static.usrfiles.com/ugd/67f5f7_9fa6d50faa5c40a08985c59e5f6981ad.pdf
    • https://static.usrfiles.com/ugd/36f25b_1463b7a0330e4e44bf65b4a1048dde39.pdf
    • https://static.usrfiles.com/ugd/83b1b3_678ad205849047c6945b529ec4f23f03.pdf
    • https://static.usrfiles.com/ugd/50de67_59ed65f384824c128e96897f942d27f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f090850b74b64d3a8f71303a4b695341.pdf
    • https://static.usrfiles.com/ugd/dc98cc_a9cda02824a7473fa58b9b4010caeab4.pdf
    • https://static.usrfiles.com/ugd/225520_3a6e8fde9af24104b777f0250fa20227.pdf
    • https://static.usrfiles.com/ugd/b8c837_010e32fbb9eb4af9b57cecb99bbd14a7.pdf
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/el_atravesado_andres_caicedo_libro.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/vaxivizovufexepirororezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/synonym_and_antonym_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2624/3996/files/14423345007.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/architecture_meaning_and_place_selected_essays.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/watchtower_quest_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/colocar_assinatura_digital_em_documento.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_off00006742.bin
88c7e597d460550874a1a6e63c92790b3019c71c5eda88ef9e75bb6a3eacb90d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 5532 bytes
font_01_sfnt_off000079f6.bin
af222ee199908d0aca19ea06ee74d03ec43a5f214336b6f42f7ccae9d6755ddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F6 10472 bytes

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