Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6137a788644f486…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 13:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: decab35448d5996e70c0ff05433dc321 SHA-1: 5c2925fff384e7a2795ba972b3eb235aff857bc0 SHA-256: d6137a788644f486a3aa288f419e68ffd4baa5d7190dde677dea8366f01a52d1
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=party+planner+guide+badge'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs. The ML classifier also strongly flagged this PDF as malicious. These factors indicate the document is designed to lure users to malicious sites.

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=party+planner+guide+badge
    • https://static.usrfiles.com/ugd/1be480_94aba20b88124fc5a3f9e545300b63c8.pdf
    • https://static.usrfiles.com/ugd/db1da1_a2b1381babed4d2fa9c29d1eba9b746f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0abcaceee78f4e7dbff6621253b4b752.pdf
    • https://static.usrfiles.com/ugd/fac845_9d0e76c639ff42ea863e8eca879db748.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_f7beed8fa9634a489e1a276801549de5.pdf
    • https://static.usrfiles.com/ugd/f46427_9e237ade7edd4c5d87663c54cdd477f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_16f9b168beec40f4aba744411290e806.pdf
    • https://static.usrfiles.com/ugd/1f5cef_c89609b29a284032bcd577867cc5c9b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1a25227efe24efa84f4228e272ced14.pdf
    • https://static.usrfiles.com/ugd/e73fea_d965d808e1fa414786dc8419bb614b82.pdf
    • https://static.usrfiles.com/ugd/b8c837_05f288aff3d64d7496fe0bdac36ce92d.pdf
    • https://static.usrfiles.com/ugd/1c90dc_e8cd6ecef7cb41e4a470dc7c07d7c95d.pdf
    • https://static.usrfiles.com/ugd/e5a943_0d8634f9d0554f4f8395a573bc596d88.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d2b3fb03a4b4654a2d4e25a41b8e4d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b9e23b4b9934d2db19b0d21ea6496d7.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_ea06f914531e48209ee3bb4631b63265.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_off0000617f.bin
c1e9adc568288fa39f46d93cdf048665630313289933ed724cb7e322376e0fcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x617F 5192 bytes
font_01_sfnt_off0000732f.bin
89805ff42526ad8f9ca0df4396e7a4915693b2ad14787d345ed3cdb02f57edf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x732F 9580 bytes