Malicious PDF — malware analysis report

Static analysis result for SHA-256 3723d898bc56890d…

MALICIOUS

PDF

42.5 KB Created: 2020-08-29 17:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe1d31a6f446f3a54242cf01188aa9c4 SHA-1: ccb21a5d6b22bc97eb60b7b2690a74e48f7972ac SHA-256: 3723d898bc56890d1fd3a34a35bcbd8b78ec4f9e11e6e9119c7df698e80b5a6b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wix?keyword=noticia+de+un+secuestro+pdf'. The document body, though heavily obfuscated, contains this URL and a fabricated headline suggesting a kidnapping, likely intended to entice the user to click the link. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign content hosting services, but the primary malicious intent appears to be the redirector.

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.com/wix?keyword=noticia+de+un+secuestro+pdf
    • https://static.usrfiles.com/ugd/b8c837_a054bf630dbb487b9970bd36e6cc5104.pdf
    • https://static.usrfiles.com/ugd/b8c837_11efaf39fdf346398699d2fd99adfbc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bcc7ed12d6f4e20a27e744070c3c711.pdf
    • https://static.usrfiles.com/ugd/b8c837_00a9562b2044405db30aef232bb75b87.pdf
    • https://static.usrfiles.com/ugd/34ec99_8298b045c59d4d028b236f9fce772d17.pdf
    • https://cdn.shopify.com/s/files/1/0462/3132/2773/files/what_is_a_gunther.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/99976667443.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/jurnal_nasional_akuntansi_sektor_publik.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8929/files/budasavarifedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/pasion_de_gavilanes_capitulo_30_comp.pdf
    • https://cdn.shopify.com/s/files/1/0437/3980/7893/files/57062831688.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/mezazudunepedev.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/machu_picchu_maps_and_visitor_information.pdf
    • https://cdn.shopify.com/s/files/1/0429/7588/7523/files/blaue_reiter_almanach.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_off000065f9.bin
bd1e71974af9070c84be7b19d14788b7a5e95ddbc8a38b4844de1791c7fe9e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F9 5084 bytes
font_01_sfnt_off0000774b.bin
f1f51ae018acc10eb8e57b01889d565c60abd0df5267bc99aa2f51da8ce02276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 11232 bytes

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