Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ae24c28877f22f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 01:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec7ab1cd92bb691df4e2b6594e36a2cc SHA-1: b2da1cf3e8789d314ef088ee03fde4472b932fbe SHA-256: 96ae24c28877f22f39c0e8cdebc27177f5e081cfe4ae0139d364b7ca8103c0cb
154 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, specifically pointing to 'https://ttraff.cc/wix?keyword=gezginler+play+store+indir'. This URL is presented within the document body, disguised as a download link for 'play store indir'. The presence of a large number of external PDF links, many pointing to static.usrfiles.com, suggests a link farm or SEO poisoning tactic to increase visibility. 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=gezginler+play+store+indir
    • https://static.usrfiles.com/ugd/b8c837_6366f00460ca466b9f98981ffee03785.pdf
    • https://static.usrfiles.com/ugd/b8c837_2977d4f4b08f41228e7cb93640987667.pdf
    • https://static.usrfiles.com/ugd/b972d5_9baa707676e34bdfa947d53bfa63f301.pdf
    • https://static.usrfiles.com/ugd/e23fbb_f09902efbafd4474bb206b1c0dcfb4e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_13c88426f0d94e63b2eba14d524863fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c2822a9f28f4b95b2d64dc3fd33af63.pdf
    • https://static.usrfiles.com/ugd/ae15ca_cfe4db8974694edb934a219370c5094e.pdf
    • https://static.usrfiles.com/ugd/c0b427_3816b80e1edf422d974e6cd47c95925d.pdf
    • https://static.usrfiles.com/ugd/67e251_e5f2851a7c734689a9995fe6d4cccc7a.pdf
    • https://static.usrfiles.com/ugd/c83fdb_2f13d5e4955c4116b6cfde78f6aa4897.pdf
    • https://static.usrfiles.com/ugd/eed56f_08b9929e241841efab3ca59c21874a6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d6aea8c2aee497888f58e33595ee7da.pdf
    • https://static.usrfiles.com/ugd/33a2e4_8b0167549f7a4177ad3a1e62c5e605d6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005779.bin
66f58fa58b4129307d0f27cfa16601f1d5669cf1c8903ceb9ae02d4be2fd3f63
pdf-font-stream PDF embedded font (sfnt) at offset 0x5779 5096 bytes
font_01_sfnt_off000068e8.bin
f818322246c4602d0e878e939b4adb1fd0640d97e8ec182eef747c21d1246602
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E8 10056 bytes
font_02_sfnt_off00008b21.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B21 4324 bytes