Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9ab6e09a544cb2…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 09:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fd9de671141069e00a5a8f1284ec26f SHA-1: 9bbcc629f511b31936981eaeab99c65928e26edd SHA-256: ae9ab6e09a544cb2c1262747933a7cd300b6ebe4f80885385a2bb66f843dd2e0
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to shopify.com domains, but one critical link directs to a known malicious redirector. The document body itself is heavily obfuscated but contains the primary malicious URL. This suggests a link farm attack designed to lure 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=administracion+de+produccion+y+opera
    • https://cdn.shopify.com/s/files/1/0469/0595/0368/files/35167222420.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/39760090130.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9324/files/kakoposofipadatilozusejox.pdf
    • https://cdn.shopify.com/s/files/1/0434/7697/5768/files/sony_18650_vtc6.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/dragon_ball_fighterz_android_21_team.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c003d2a28aa4a4eacde3f4b8f18d0fd.pdf
    • https://static.usrfiles.com/ugd/64d889_dc90f542778f44179f68b832352cc37f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ec49a0ee4824ad0905838b2e0b8662a.pdf
    • https://static.usrfiles.com/ugd/be19e1_9092156f09dd431f99343df23a085581.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0d0db37e54a4621abbaad0e5e4afaaa.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/kisesadejilejixewevagufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/muruzogejuzek.pdf
    • https://cdn.shopify.com/s/files/1/0437/1454/3771/files/catecismo_mayor_westminster.pdf
    • https://static.usrfiles.com/ugd/19103d_e6a7d56d748d46b7a890372d90ce1156.pdf
    • https://static.usrfiles.com/ugd/5af86b_08ed9b61350e47f69c39ed670392f9b0.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_off0000607b.bin
fc34d088c0f387f4be50b5555e5063a1d488ff4fc56c2d33ba76bea2272ba318
pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 5280 bytes
font_01_sfnt_off00007253.bin
b059d9dbdd53257419a56449fe11c68357a9a388af7df094ca6c71650ee74abd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7253 11192 bytes