Malicious PDF — malware analysis report

Static analysis result for SHA-256 218e0aee1e9fd105…

MALICIOUS

PDF

45.6 KB Created: 2020-09-01 00:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dddecf2cfd248301782cf95cbadf881 SHA-1: 806532a4b0e8ba59f30d0eae1a9c76550eddee24 SHA-256: 218e0aee1e9fd105e4b51be6054427f750ac16c99a323fa661ea446d500b7fbf
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=change+alarm+sound+android+5', which is likely intended to lure the user into clicking it. This URL is associated with a known malicious redirector. The file also contains a large number of embedded links, many pointing to 'static.usrfiles.com', which is flagged as a link farm.

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.club/wix?keyword=change+alarm+sound+android+5
    • https://static.usrfiles.com/ugd/3aee12_9e5a04ba32fa40cf84d9e71b303a242a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c14416a733149fc89429cb3b7202c02.pdf
    • https://static.usrfiles.com/ugd/c8a981_4ae9e9e10a5a45f584b4294d87e555c6.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_aef1d6356a8e4e1cb78c1e9aaa1c063c.pdf
    • https://static.usrfiles.com/ugd/136d07_72be7e4996a7483197822b34f53f50de.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8903/files/remugafizefidenarilepara.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/juwutunisopuwoto.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/probability_distribution_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/7333/1609/files/44006337067.pdf
    • https://static.usrfiles.com/ugd/299074_cb8ee4c845af449586e32c93879cb4cb.pdf
    • https://static.usrfiles.com/ugd/7f16bd_5511163fc9424426aa7127bed8d47758.pdf
    • https://static.usrfiles.com/ugd/b8c837_efd35249ba134561b3e8a6ddc2c84531.pdf
    • https://static.usrfiles.com/ugd/e8506d_f046939456a84feab76696d049a1be09.pdf
    • https://static.usrfiles.com/ugd/b8c837_291db2f67b824b52b040b8c96eab7052.pdf
    • https://cdn.shopify.com/s/files/1/0439/6105/7438/files/hormona_adrenocorticotrpica.pdf
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/tekasidukagos.pdf
    • https://cdn.shopify.com/s/files/1/0438/2723/2918/files/starbucks_fdi_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/amigos_para_siempre_noten.pdf
    • https://cdn.shopify.com/s/files/1/0437/6074/6647/files/objetivos_de_la_investigacin_general_y_especficos.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_off0000672d.bin
6d9ec33fe329dfb456085d93796fccaf9d962ee760d41d519b733de3590365d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x672D 5188 bytes
font_01_sfnt_off0000789e.bin
f2962a62b1fd8b78b90df78706c9b52808c9c0c0d6bab098605440acf34bdc5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x789E 10192 bytes
font_02_sfnt_off00009b90.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B90 4324 bytes