Malicious PDF — malware analysis report

Static analysis result for SHA-256 046059803bb8f3f3…

MALICIOUS

PDF

43.2 KB Created: 2020-08-30 22:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a0f1238cba28e533ea05a0b199e77ce SHA-1: 9b62250b0565c7995184ce9304068b9e4b88efc7 SHA-256: 046059803bb8f3f37b8c51f7ed17c6d4381142113e910583bc02ef8bffce640f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though partially garbled, contains the malicious URL and other links, suggesting an attempt 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.me/wix?keyword=que+es+un+enunciado+bimembre
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6483/6764/files/brew_install_apache.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9709/files/jarazorurexadar.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/38974061197.pdf
    • https://cdn.shopify.com/s/files/1/0434/8447/9641/files/ghosts_ahoy_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/39728044166.pdf
    • https://static.usrfiles.com/ugd/b8c837_020fe300be4e4cbbadafe8ae2b3033d0.pdf
    • https://static.usrfiles.com/ugd/756799_3f8ca3bffd3647d38433903f0863a274.pdf
    • https://static.usrfiles.com/ugd/b8c837_c13b45e92b394b66b261376c780a65d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_99fad0fd65e749edbd69c1ff0b3a1c86.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_b8b766d649d5407faa0e1cd4f4e0e115.pdf
    • https://static.usrfiles.com/ugd/9ea91e_230fd8afc2d249dda65901382615eaa0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d60093e7798a448c8da43e3c348c9671.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a7f1cb66f4347cf9df3c1238c4691dc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005caf.bin
262246564e4ceb90c9fe92e135b2ef2dbea036176eff3bba374fba9c62758077
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAF 1760 bytes
font_01_sfnt_off0000650f.bin
f0de1e91786ab1a1c780a073d27d194f119f8fa1968df4475c34619a3d5a7bfa
pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 5252 bytes
font_02_sfnt_off000076c8.bin
4286d0df0f74587ae897c5083e3fdc883ea62f4f40d759ce972d4f44d90acfb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x76C8 13204 bytes