Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad69c02b1e38e109…

MALICIOUS

PDF

47.1 KB Created: 2020-09-01 08:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f0926fa8cc03b7e7324cf7de5160070 SHA-1: 450115197b64c5e1ec9a3c10f1cdf23b36721997 SHA-256: ad69c02b1e38e1099146cb5c423768c0d5ac2925b9573761fffee863110dd92e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link disguised as 'Gta san andreas helicopter cheats' that redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier strongly indicates maliciousness. The document body is heavily obfuscated, but the presence of the malicious URL and the link farm heuristic suggest a phishing or redirection attempt to a malicious site.

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.ru/wix?keyword=gta+san+andreas+helicopter+cheats
    • https://static.usrfiles.com/ugd/2e4eb4_49dddea2699546edbff9978af83b3e2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_40c5fd9c944a481ea9dd43ed29ba0cb3.pdf
    • https://static.usrfiles.com/ugd/23b571_3132d0febd8546d58866a53f03e2bc54.pdf
    • https://static.usrfiles.com/ugd/77d535_e370c5a4f97f48419979a08c5749f940.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/tujodupebotalefegomosa.pdf
    • https://static.usrfiles.com/ugd/5b9a87_d5279ea8dbcd43b8bf9abe03db8ff603.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ba8fa64ff2146f39c01d83a7ed68bbf.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/motovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0451/1298/3717/files/present_simple_and_present_continuous_exercises_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0432/8253/0472/files/employees_absenteeism.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/traductor_ingles_archivos.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_off00006d10.bin
3d7d3ae1a90ef9a74782bd7fbb25131c10959e4f068f1cfbd7af5009a569a006
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D10 4980 bytes
font_01_sfnt_off00007de9.bin
1d76df3c85ca629992e0471efb768590130a7ce6ed548eedddd3176a09383498
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE9 10468 bytes
font_02_sfnt_off0000a1ac.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1AC 4324 bytes