Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c666b530649c840…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 02:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecdc3a374f84e3d9a63b3c9445811233 SHA-1: ca798f7f0529bdb047957cc1de7bef9ef368ea87 SHA-256: 2c666b530649c8407a375188743eedfb68fd600c8c914e7f0805cbecab9d3972
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=belle+nuit+barcarolle+pdf'. This indicates an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=belle+nuit+barcarolle+pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/my_fair_lady_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/37080148343.pdf
    • https://cdn.shopify.com/s/files/1/0431/8104/7957/files/cheese_strain_grow_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7669/files/devil_may_cry_4_trainer_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/anemia_y_embarazo_2020.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_6e8c55a883c54e5b8abbea2baa192fc7.pdf
    • https://static.usrfiles.com/ugd/e2b09b_ed0811f93e5949e998baf53edf524a82.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4d5a6f8fc114c37a8460fbd3a5fed15.pdf
    • https://static.usrfiles.com/ugd/e3ff21_0af697da030240ddb096629ba61c5ab1.pdf
    • https://static.usrfiles.com/ugd/b8c837_47b75c2ec8b442cbbc60aa9968ffe8a5.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/gadorotom.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8694/files/sowogavatotebi.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c30be4bc93049b48aca438e8d593c9a.pdf
    • https://static.usrfiles.com/ugd/097bd5_eece80d23cb74f20bbb623d2332a9a6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fb9aedc51804b0da9bd5ac73ec33ef4.pdf
    • https://static.usrfiles.com/ugd/33a16d_2e2c4dbbbfec4d129dcfab570d1f27f2.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_off00006455.bin
c23265aa5b2f982eb32d43ed68b2988b3c33594faba467da99b562ab2a20a0cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6455 5160 bytes
font_01_sfnt_off000075e3.bin
ce7eeb7f0eb73fc94e488c352eaa0a2f00a8c2c68677175df409fcdc53d9d4fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E3 10536 bytes