Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9db79448ee553a9…

MALICIOUS

PDF

46.8 KB Created: 2020-09-03 01:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a78eab0594e17d5c7844d0cda674563 SHA-1: 1198fdf6ddf59e78618a62f007fa70d0473fc64d SHA-256: a9db79448ee553a95e06a40140ad974b248336413bc87b9c01e5535c482eec5d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=angeles+city+walking+street+guide'. This indicates the document's primary purpose is to lure the user into clicking this link, likely leading to a malicious website or further compromise. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning tactic, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/wix?keyword=angeles+city+walking+street+guide
    • https://static.usrfiles.com/ugd/e32576_ad6cdde4a9c84b7e9299b8d26f4b92a7.pdf
    • https://static.usrfiles.com/ugd/15cd4d_8171e4f251a24de28dbec6b9d5db94f5.pdf
    • https://static.usrfiles.com/ugd/278743_e4875b82026e4d06836d869f480ffd07.pdf
    • https://static.usrfiles.com/ugd/b8c837_c87dbd217165444982bf33fe136bafaa.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_f47a605f405d4482adfd668eac929330.pdf
    • https://static.usrfiles.com/ugd/607883_f20284f7476044dd8c49e378e755eaf1.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/reglas_de_nomenclatura_botanica.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5187/files/counseling_psychology_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/jivevu.pdf
    • https://static.usrfiles.com/ugd/f09a9d_999aac83ea1d4aa48f9cbb5feae0c608.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_b7060f50abeb42dfa61e3de124a49d9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6371cab9a18e4de4afbad73d6b44d57c.pdf
    • https://static.usrfiles.com/ugd/46429b_ca565cb826904d5fb28f8dd354c81a46.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007851.bin
9fdb3f1b97aaa21ed760f2f13eebdf3354fd39823133ea94cafbc64e1e34af48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7851 5356 bytes
font_01_sfnt_off00008ab8.bin
5e7a2f12a14ae77b6bcb0888c64a01479c7fd8d1221b275c990ad8f783cfa0bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB8 10560 bytes

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