Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea46077c3ddb53e…

MALICIOUS

PDF

58.5 KB Created: 2020-08-31 11:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5897661c326bb8146d9df448c74707ee SHA-1: 52b2800aa0e16a0695be0ae2f1bd1c9be5a804f0 SHA-256: 0ea46077c3ddb53e106ce96a9785bbb62e3031d81f3699e85df17828612976b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing. The presence of a large number of external PDF links further supports a link farm or redirection scheme.

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=moto+360+speaker
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8b2c09_34825ff983524b20b817529539de2436.pdf
    • https://static.usrfiles.com/ugd/cac9e4_faed27b61432473b99f4629233c5fdf6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a644d38499694b9c92782ebd48abfb49.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a2f1bb028824d18b235d7011b930a57.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d441e442d24465d8a858796d771ab93.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/pedunezuzelavinosove.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/26305977744.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/52320885496.pdf
    • https://cdn.shopify.com/s/files/1/0443/8884/3686/files/cayaponia_tayuya.pdf
    • https://cdn.shopify.com/s/files/1/0465/3803/1254/files/efectos_de_la_sentencia_del_concurso_mercantil.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/ranolojuxuso.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/sifirefujusise.pdf
    • https://cdn.shopify.com/s/files/1/0434/6668/6629/files/rawava.pdf
    • https://cdn.shopify.com/s/files/1/0440/4363/2805/files/gita_gita_press.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a91e.bin
c0e574a0769a39258c6c0c453900be48f524469ab587780db3cd43b70dc0f40d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA91E 5312 bytes
font_01_sfnt_off0000bb3c.bin
69d1011f6841a169f63b7ae8a109f430d7cd6c2ce1ca077823779471f09bff3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3C 10084 bytes