Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a4e6947f212e83…

MALICIOUS

PDF

78.6 KB Created: 2020-08-31 19:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd39093598708e8efd980df6f78b2256 SHA-1: 4e691b934708de47479fcb7267a2598abc30c4cb SHA-256: 98a4e6947f212e83843c63451fc7bcdc5705cf7af1905046d72cee1a30b721cb
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to a domain identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=informix+4gl+example, which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious infrastructure.

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=informix+4gl+example
    • https://static.usrfiles.com/ugd/9cc572_e9de0540f4054613b7c7554b3d5c34d8.pdf
    • https://static.usrfiles.com/ugd/5438e3_61da27c7cf0847eeaf5d8b7ca42accba.pdf
    • https://static.usrfiles.com/ugd/b5aed9_b4185f88b79b4e1185b0474c24753c88.pdf
    • https://static.usrfiles.com/ugd/ce5d00_c41ca87fe68f41ceb300866c9224bcca.pdf
    • https://static.usrfiles.com/ugd/33c377_88828f90c7654d79a1b13f5284e1f942.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcdcae093c5d4f0183a0be9bb8c53f65.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c308b80a8334f6cbbac0840859dd934.pdf
    • https://static.usrfiles.com/ugd/8cbfce_94fce2f9d190423db363e0d41c6b0f2e.pdf
    • https://static.usrfiles.com/ugd/dd6616_8eaba380c1984bfa83cbe424acd5294d.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5976/files/airport_extreme_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5382/6726/files/hssc_annexure_e1_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/treatment_of_depression.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/jitigusokadegufax.pdf
    • https://static.usrfiles.com/ugd/f1d680_14cc290fcb154f32afa8d74161f580c0.pdf
    • https://static.usrfiles.com/ugd/c63dba_2aa5e3e3b7c24867b33b3c26b6574510.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ed4e5c9e25a441da7a1e67086ae9b1a.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_off0000ea36.bin
a57b2e6d4096393cf69ab3589bf075af92615535dc9c031d2e494bea98f1c20b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA36 5136 bytes
font_01_sfnt_off0000fbaa.bin
19c39a90bdd644a0be1c75965ca5d9a25dc27aa54d15e9115a8f0ff7b40722f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 16120 bytes