Malicious PDF — malware analysis report

Static analysis result for SHA-256 147127dedfca9ea8…

MALICIOUS

PDF

42.7 KB Created: 2020-08-31 05:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d691b933b085f11b32ca2a29b0707bb SHA-1: 77afee206075628386d62c1c7be3dca205d2ed26 SHA-256: 147127dedfca9ea87bf6d1d906f9a2c314cd682f5522945171b335b01fcf82b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristic. This suggests the PDF is designed to lure users to malicious infrastructure.

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.com/wix?keyword=materia+ffxiv+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c63dba_1dc873ab77014e5a97de36f55a174f41.pdf
    • https://static.usrfiles.com/ugd/f46427_88aeb906275d47919458d0a6a37899ec.pdf
    • https://static.usrfiles.com/ugd/76156b_37de2128df7b46709443d545cfd5b676.pdf
    • https://static.usrfiles.com/ugd/6cfc61_2bf42c87b21649779cef93162cf4a5bc.pdf
    • https://static.usrfiles.com/ugd/d17951_c91cdf7eac5047cdb63e112cfc7d16a3.pdf
    • https://static.usrfiles.com/ugd/51c472_91743f7279bb4c9a86df29c2d0864e8c.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_78266cf41d2d46ff9c0a793faaa92bce.pdf
    • https://static.usrfiles.com/ugd/3f4b99_5ad3b1c0b39c453280bb8bc7227f4c1e.pdf
    • https://static.usrfiles.com/ugd/dc98cc_929ce5f857564734b7ce3e3d70ef6008.pdf
    • https://static.usrfiles.com/ugd/5438e3_79b56edc24374a68936fc9563be4b06c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2df26a97b4c64eae930d8ae76ac9163c.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_6c70e911f64a41228d8730999f2e388c.pdf
    • https://static.usrfiles.com/ugd/7baf93_c6c47fed95b546b6ac76e99d2da00be6.pdf
    • https://static.usrfiles.com/ugd/b8c837_023c3f9e750b484f8a16210357773a9f.pdf
    • https://static.usrfiles.com/ugd/b7ed05_8dd7769e6ae94821aa72dc8716de6249.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/nefevuvuno.pdf
    • https://cdn.shopify.com/s/files/1/0447/5607/4645/files/98202192016.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_off0000697f.bin
5c8f07699a569d6d3ff091e4e04a91e70e279baf358b8dda5d3d8c8b02bb4ae7
pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 4996 bytes
font_01_sfnt_off00007a9d.bin
594f287bf5c41df4c4d0274f0b9ba810a5f30a57e11b4f7dd70d6f2cea310036
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9D 10388 bytes