Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8b8d4da9c6a5f6…

MALICIOUS

PDF

43.5 KB Created: 2020-08-31 09:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30d1c97ae74b4283d0bdf2f433a2bee7 SHA-1: f04b251e7bfaca4a1f13939d154eaef912955fc3 SHA-256: ce8b8d4da9c6a5f6e2d71772477b77483be1710407165b94fc8389b525c3a1e7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and also references a large number of other PDF links, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=catalog+heaven+best+weapons
    • https://static.usrfiles.com/ugd/b8c837_16d878a99e694a5d98a201f02f8bfb7a.pdf
    • https://static.usrfiles.com/ugd/6908d7_f4f582240f484f00a2f2cd73227d3ac7.pdf
    • https://static.usrfiles.com/ugd/12f4eb_d016bdcb55df4dbcadd00053acb154c1.pdf
    • https://static.usrfiles.com/ugd/822ecd_14e3f89d10cc4396b2644ed094240e24.pdf
    • https://static.usrfiles.com/ugd/a107db_f33bca3b7659450085b688cda3dbe703.pdf
    • https://static.usrfiles.com/ugd/b8c837_bec52d215bef415bab6634e77357ab05.pdf
    • https://static.usrfiles.com/ugd/7baf93_641b07e5631b4ba3b4f9be946b6d1d67.pdf
    • https://static.usrfiles.com/ugd/b65acf_ec3b45c9e62d4adfb4f483ff8afee88f.pdf
    • https://static.usrfiles.com/ugd/f1d680_14cc290fcb154f32afa8d74161f580c0.pdf
    • https://static.usrfiles.com/ugd/73c254_80842e6c044345498c66d4ceb1ae9963.pdf
    • https://static.usrfiles.com/ugd/8c0e65_2d3f776b62e3411c968171b0f5c2de0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_986b05e44234406e925ffbbe2a2f49c5.pdf
    • https://static.usrfiles.com/ugd/09273f_61d78c5a56164341bb4e2f95206434a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_cade67cea84a41fc9e88258cc3f9f00a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f69ea42282094b68bd592068c6598635.pdf
    • https://static.usrfiles.com/ugd/7dd30d_b5e07659674647148214591ab7b7d407.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bc31f4d6b524514a431ef7b2747371e.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_off00006b74.bin
0a3e84588496d64548cd56873e5e99cc53a79dda7fc323eff514a7dbae3f86e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B74 5184 bytes
font_01_sfnt_off00007d28.bin
a38710c57f68e136df29156f4a7ddae303d3777934575cd64dc37a3aa5cf0803
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D28 11080 bytes