Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f297c93ae2c474…

MALICIOUS

PDF

37.8 KB Created: 2020-08-29 14:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b27221cd9f838ce6831b6bfaf1e95e42 SHA-1: fda7bb24290b87b23b53a6c51dbfca7e50567e6d SHA-256: 73f297c93ae2c47447128abf9872615bb4a4d523237e35f79e03e3ed21b09bea
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, including a critical redirector link to 'ttraff.me'. This suggests the document is designed to direct users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=genel+kimya+ders+notlar%25C4%25B1+petrucci
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/36420794872.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3510/files/zazote.pdf
    • https://cdn.shopify.com/s/files/1/0431/1017/0786/files/narasimha_karumanchi_data_structures_and_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/gebozagavezevanafe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/ziradepexotaj.pdf
    • https://static.usrfiles.com/ugd/b8c837_f61697fbbfca412fad636a8277cb0085.pdf
    • https://static.usrfiles.com/ugd/77d535_7a5aa958012f4ca690bff9c990d42596.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a0e6b96e0054e66b3df5e7edf94b590.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc8e52f31d8a46a3b47b84bedcd9b529.pdf
    • https://static.usrfiles.com/ugd/b8c837_93fe84e100b6477d969d195a3613f412.pdf
    • https://static.usrfiles.com/ugd/0dd040_915a80635ae845599a471850c8d459df.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f68eb444f0f46489efea14ce3ee0019.pdf
    • https://static.usrfiles.com/ugd/26938b_95a2c0438064486ba4cb7e946c471567.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/64109181922.pdf
    • https://cdn.shopify.com/s/files/1/0440/1764/7766/files/ffxiv_placard_macro.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/29943414750.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8722/files/lidibimalikovujinifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/anker_soundcore_bluetooth_headphones_manual.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_off000050d5.bin
ecba7addabd0a4be049313bc080aea38729c021b51be12bb51bad3d246080fbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50D5 5448 bytes
font_01_sfnt_off0000634f.bin
0c634b6b40e383aaf242288a765205f356882bba02224e2ffc332d36bca6475e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 11568 bytes

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