Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf82aca1f7a6dcf…

MALICIOUS

PDF

45.7 KB Created: 2020-09-05 04:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e388e6d331626e83183c40846a1ab020 SHA-1: ee4cfc0ff15ec0f0248e5039f47eada07a993df4 SHA-256: 0cf82aca1f7a6dcf2e25c23169e043ce130024296699486288ca098b135d5238
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=call+it+spring+platform+sandals'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to lure users to malicious content.

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.me/wix?keyword=call+it+spring+platform+sandals
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_2f5ae58e2d734e10b331da350aea6af8.pdf
    • https://static.usrfiles.com/ugd/902d29_dedce2c39e4847e3ad22a07a47c209ce.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_db9380f1fce3408a9a74f49968efb7c4.pdf
    • https://static.usrfiles.com/ugd/0d089b_cb12ab07b0de4328aa7dbc04acced0c9.pdf
    • https://cdn.shopify.com/s/files/1/0452/1938/1399/files/worthy_is_the_lamb_who_was_slain_chords.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5983/files/zukapo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/9897144664.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/werizugawave.pdf
    • https://cdn.shopify.com/s/files/1/0439/1315/0632/files/powutamadokupuvegixuvu.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_0c1a4110b4d342a3b18c33e6ec2ce953.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_e3eb864757d24a41bb65f278cb19974c.pdf
    • https://static.usrfiles.com/ugd/01e791_0c47de9eba0e4ab1991781777ae24cc7.pdf
    • https://static.usrfiles.com/ugd/1decf9_5e8c0c5d796a489c912d53564cf03708.pdf
    • https://static.usrfiles.com/ugd/b8c837_7474e173042e48d09a9aaf84ad0c5dcb.pdf
    • https://static.usrfiles.com/ugd/17beed_9b0312009bee465f9629bc0ae7ecfc05.pdf
    • https://static.usrfiles.com/ugd/87a178_b4732ec580614e299f303c8e517516c3.pdf
    • https://static.usrfiles.com/ugd/6c8f37_5097aceef2f04f97a0275be14bdb418c.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000749c.bin
03a34a943b1281853e7e494f3853c1c1d444398404de5ad66eeada439dfcc9c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749C 5268 bytes
font_01_sfnt_off0000866c.bin
e640a2c711afbe54a11b49a9beb0dfb9421ce876e5363551d6ad4b4b57cbdeab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866C 10364 bytes

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