Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad3518a53f61896…

MALICIOUS

PDF

48.2 KB Created: 2020-08-29 16:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e79eafe8b155817494653cc3a4d0f696 SHA-1: e8d6186abc27a467505e7e28b175f282fe0dfd8f SHA-256: 7ad3518a53f61896f6a6a4aa2581b9df98c7fd614b36562dc3f626fe4a7ac496
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL that is flagged as malicious. It also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=panasonic+sa+ht940+manual+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e6a1dd58cfee42ee9a569df62f8afcd9.pdf
    • https://static.usrfiles.com/ugd/9c43ec_46b911ea97514a698a67a4ac14cf3683.pdf
    • https://static.usrfiles.com/ugd/b8c837_8721ec39ed8242659ef8b3856c7e077f.pdf
    • https://static.usrfiles.com/ugd/1f2646_be68a953a0b24fc485ed1382e737da06.pdf
    • https://static.usrfiles.com/ugd/b8c837_c90be221867b471ab1ce3eec6149f1c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_809096bc45d647aabe6144a7a1001dca.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e24c6fa2c754dc99b2900516f28e6c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3a5991bec5e4334a69d2fa0767e093f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a5b9655f91b4c0ba1acc5a93a23f9d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a1106e07fa74690aa14897735df7630.pdf
    • https://static.usrfiles.com/ugd/b8c837_1526747ca75a40349b438c9bd8466d4b.pdf
    • https://static.usrfiles.com/ugd/b8c837_312ad0571ab1466f833c3adc3bb07fe7.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb8056e2478d4a9590e3d1a63ee3de1e.pdf
    • https://cdn.shopify.com/s/files/1/0431/5591/4918/files/amandemen_pancasila.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3873/files/sign_in_to_icloud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/29211143377.pdf
    • https://cdn.shopify.com/s/files/1/0437/0114/1657/files/tratamiento_para_anemia_megaloblastica.pdf
    • https://cdn.shopify.com/s/files/1/0440/3891/4213/files/watuwutijefizobeb.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d2.bin
45e63b8ef5ad68f78585ea798b3044ba783464b5225411424ec1676a6442afb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D2 5688 bytes
font_01_sfnt_off00007a02.bin
4583b7e483d849c0b17b2cd9f7c46328513644a351de1004089b2e756f724cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A02 10620 bytes
font_02_sfnt_off00009e59.bin
cc032a1d7efe9f52c63bdca4360dad9aff78fb14a47167d9e0089e6cc9416013		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E59 16232 bytes

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