Malicious PDF — malware analysis report

Static analysis result for SHA-256 52664046661b30b8…

MALICIOUS

PDF

45.6 KB Created: 2020-09-06 20:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8d51029372a27719ed0ff8f99b70f3d SHA-1: fcb0e0bad8fed4cdb3e9f6b933837f3864598a92 SHA-256: 52664046661b30b8b7d38a41182d1731ab4b90a2312f83bbc21b7d7a02fa1f10
152 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, ttraff.me, which is used to lure victims with promises of software mods. The document body, though heavily obfuscated, contains the same lure text and URLs. The PDF also hosts a large number of external links, many pointing to static.usrfiles.com, suggesting a link farm or redirection infrastructure. No scripts were extracted from this sample.

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=candy+crush+apk+mod+full
    • https://static.usrfiles.com/ugd/83d902_22074c30572246fab036e75edda3c5fd.pdf
    • https://static.usrfiles.com/ugd/e73fea_5bbb6b2a54084d64ac6040b6373375f9.pdf
    • https://static.usrfiles.com/ugd/69695d_dcc0d42c49b24ef097be5a2ec0095317.pdf
    • https://static.usrfiles.com/ugd/b8c837_951a8be07acc42fcb0759543a8036017.pdf
    • https://static.usrfiles.com/ugd/3b6424_637d52f6db984ff9a724b071107e4bd7.pdf
    • https://static.usrfiles.com/ugd/b7ab08_9a2a1b79ddb249ef923d00f4bd2bc3bd.pdf
    • https://static.usrfiles.com/ugd/963627_a179b658e1e74cb5914b78510c354d00.pdf
    • https://static.usrfiles.com/ugd/5262df_489d0f219e4d44c68658adeab2ca3747.pdf
    • https://static.usrfiles.com/ugd/b91566_9c4f1a4b27504cfe87503216542427b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_eeaac545b6a84c08a8ad391ea071310a.pdf
    • https://static.usrfiles.com/ugd/10e3af_076dd269155f402d8d477c63657524d1.pdf
    • https://static.usrfiles.com/ugd/90c678_71d56613e9ad49ed9ea76030cebe38ae.pdf
    • https://static.usrfiles.com/ugd/74e9cf_283181442bc2442f8ab6a17ae6deca76.pdf
    • https://static.usrfiles.com/ugd/10b11f_8e966aee3c9a46c0b98f2cd7e3672c60.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_off0000739c.bin
b1bd21384516ed3b1787c4e8cd53248ea7fbfd1c97358ff39e718c959805ff39
pdf-font-stream PDF embedded font (sfnt) at offset 0x739C 5464 bytes
font_01_sfnt_off00008612.bin
2fea717f013ee031f4eed9a64f625f27127be9c6dd2e6917ec1388a122b722fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8612 10432 bytes