Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab90483e14c4ebb…

MALICIOUS

PDF

32.0 KB Created: 2020-09-08 01:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2dea10034866292788110c1f5c141cf SHA-1: 160c15a3353264066420c6a0b7ab5b33b6e47afc SHA-256: 4ab90483e14c4ebb1b4bdfa754572adb084382bda31dd25ce6c1bf566868fc02
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a video editing app. The presence of numerous external PDF links suggests a link farm SEO tactic, likely to obscure the malicious redirector. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 3

  • 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.
  • 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=best+video+maker+app+for+android+mobile
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7096/3366/files/32056764482.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/49581087204.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/bivalozek.pdf
    • https://cdn.shopify.com/s/files/1/0434/3670/3900/files/ocr_a_level_chemistry_kerboodle_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/52422373856.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/tobabimuwubekudozesenozot.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5675/files/public_relations_department.pdf
    • https://cdn.shopify.com/s/files/1/0465/3986/6270/files/band_of_brothers_all_episodes_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/ligodofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2626/files/cisco_anyconnect_mac_4._5.pdf
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/pipubovogunomonafomabox.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4812/files/one_republicgood_life_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/47188018038.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff4.bin
ec31455ac5c7eaf83b2ede3ac2d2ec6418c267fc912255f81349dc9289e7cedc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF4 5500 bytes

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