Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca27fa576477e49…

MALICIOUS

PDF

91.6 KB Created: 2020-08-28 21:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da0eb46b2b98be879caedcc5a66113d8 SHA-1: e271502f14c93eaa8ace7d151560be41dcc0e473 SHA-256: 6ca27fa576477e49522f3df863a2807708b02831df6829c372b006cb6b3b8d0b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a download button, aiming to lure users to a malicious website. The ML classifier strongly indicates malicious intent, and the PDF is flagged for linking to known malicious infrastructure. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=garfield+tamil+dubbed+movie++tamilro
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/b8c837_d224297b83204df286bf3ea34a045d72.pdf
    • https://static.usrfiles.com/ugd/b8c837_c348125c14e743af95484c08f42a5667.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ca6f42af8504f15a09752679f7346c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_97f6b10ce3454c0db85ad522e47a3c50.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6231/files/rbc_capital_markets.pdf
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/9207432824.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/kizivevuvubinetuxakas.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/92034123746.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/dictionary_of_language_teaching_and_applied_linguistics_1992.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/49734832498.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5765/files/lutug.pdf
    • https://cdn.shopify.com/s/files/1/0438/4751/6325/files/11317864865.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9733/files/27719948246.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6a7acd930df4189b0463412e8d27f4b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d387e0ed889c4da19f37f4ee07faba37.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bdce39293c54a7a9f3752d5b4024c03.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e457.bin
b3b6e3e907a8355adaa8d37b46be8326cd6a8ba6c02f3706fe664a331f2f8c8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 5108 bytes
font_01_sfnt_off0000f5a3.bin
641f33fc14b360f1952e300b782dbd3042703bad75f0208a7e8747e2d234bf04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 8144 bytes
font_02_sfnt_off00010bd6.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD6 3720 bytes
font_03_sfnt_off00011732.bin
c0e39f44321a474cc328806e737293db5bfd2873d0430c567f64257ef24eb06f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11732 1716 bytes
font_04_sfnt_off00011fbd.bin
23973a2a5828a7f21a75b1b0a6418a45f6e9b3728767bf78f1d53d7a370a044f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBD 11272 bytes
font_05_sfnt_off0001460b.bin
b83814c07f5f05d72a2ac047feebd3513e7c74dbcc392318b59b48eb326c1a4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1460B 7316 bytes

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