Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8d6f52f3bfc210…

MALICIOUS

PDF

43.5 KB Created: 2020-09-02 20:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2284d98e81ed5d1af16ac7abdf58f959 SHA-1: 6dc7771671079c7dd182b523fb054729a419bf43 SHA-256: ac8d6f52f3bfc210fecb3aa7239a19702bcb3ca4651a3b4abdb04c64c69ce807
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to movie downloads and the malicious URL. This suggests a social engineering tactic to trick users into clicking the link, likely leading to malware download or a phishing site. The ML classifier strongly indicated maliciousness.

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=chennai+express+telugu+full+movie++mp4
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/29398495752.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/javunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/reallifecam_password_login.pdf
    • https://cdn.shopify.com/s/files/1/0438/7920/2984/files/2715335500.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4550/files/the_mckinsey_edge.pdf
    • https://static.usrfiles.com/ugd/0a593f_dd854d09637249439afb10659651593d.pdf
    • https://static.usrfiles.com/ugd/738632_07dd3c04cc4c4591936a34ad98f6b0f0.pdf
    • https://static.usrfiles.com/ugd/45e30f_c952b5a5dad24ba7825cfde856b32d9d.pdf
    • https://static.usrfiles.com/ugd/ab059d_a297e785fc66400a87a17aba28bdc033.pdf
    • https://static.usrfiles.com/ugd/eb6612_730fd2af3ec140bcb0a3767b68dd422b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b4e67165c1340dc9c99ea615bc83a72.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_4771350cfd494816bd830e06535a5d90.pdf
    • https://static.usrfiles.com/ugd/1be480_7f33fd7e13354ef29d2da106a3080667.pdf
    • https://static.usrfiles.com/ugd/5de1df_087fa9874d6147f786055e1aa56aaa18.pdf
    • https://static.usrfiles.com/ugd/6846fe_17e0adf1aa7d4c5296179e52b8a28222.pdf
    • https://static.usrfiles.com/ugd/2ca22b_fa53df2183f44ff090c6894be62cb4d2.pdf
    • https://static.usrfiles.com/ugd/234f58_da6a7e1a64bc491983ccd414e46b7fb5.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_off00006972.bin
3eacb1241f1c97d54e02edb9785230e827601efe476d2f6634f4628d329b94e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6972 5436 bytes
font_01_sfnt_off00007bd4.bin
7f382415fa05aedbc2b9c124f2c2b3c9c597cbb4b71b39f3301a13efc0eaa24e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD4 11064 bytes