Malicious PDF — malware analysis report

Static analysis result for SHA-256 436eb9d878d95989…

MALICIOUS

PDF

49.7 KB Created: 2020-08-29 20:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b4cea2d9a56d46adb2456ecc9584aea SHA-1: 090320b95c8b2775530d2504561415ffca74bac3 SHA-256: 436eb9d878d95989c07daa2e7b55566fb02b560d3e8f6c35d2fa0881bd30875d
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a known malicious redirector: https://ttraff.com/wix?keyword=son+of+hamas+pdf. This suggests the document is designed to lure users to malicious websites, likely for phishing or malware distribution. The presence of numerous other PDF links, many pointing to Shopify and usrfiles.com, indicates a potential link farm or SEO poisoning tactic to increase visibility of the malicious redirector. 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.com/wix?keyword=son+of+hamas+pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2769/files/vatican_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/78902281890.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2137/files/algorithme_cours_ofppt_tdi.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee6500cddca948f0a9db217b15bce96f.pdf
    • https://static.usrfiles.com/ugd/b8c837_879f671782e24293b1828d4ec565c091.pdf
    • https://static.usrfiles.com/ugd/b8c837_20459afc700a42488d6fbbe7b22ba76b.pdf
    • https://static.usrfiles.com/ugd/b8c837_86dd7df1111f44f0943b8e13ec3c3482.pdf
    • https://static.usrfiles.com/ugd/b8c837_86d3e3027366436b80a3352bdbbf305f.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbc3e5146f5d47b9bd1c8682daaed1fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff27de603d9f4ea992adab937c5f82db.pdf
    • https://static.usrfiles.com/ugd/b8c837_c126fe0be78f4f7f905304c093dba482.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_off00006ba3.bin
bd6aef5b781b0476f62e525e8df92e7aa28f6ea4f5b688d77c615bfea38d494e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA3 5256 bytes
font_01_sfnt_off00007d55.bin
28e2e8ceb6a83c23d9cc4714401b9e64a88ff324e377b39157371504f5e39a89
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D55 10072 bytes
font_02_sfnt_off0000a00a.bin
c06255f7b2dac3356a6362ccdd743ec2e94e289a5a974470eaa86cc9e62e5608
pdf-font-stream PDF embedded font (sfnt) at offset 0xA00A 17668 bytes