Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f01e0fc3cdb8a3…

MALICIOUS

PDF

45.4 KB Created: 2020-08-14 15:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24809c27ab48537f8ec4a45ec92000b SHA-1: dc18b153b4439216a8a8cd03d7ce2202ec5f9131 SHA-256: 63f01e0fc3cdb8a3c0cea9448f026c13ddd4320e040aa72c5c29a25fc1f865bf
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection scheme. One prominent URL, 'https://ttraff.cc/pify?keyword=you+cam+perfect+camera+apk', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, indicating a likely attempt to trick users into downloading potentially malicious software disguised as a camera application.

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/pify?keyword=you+cam+perfect+camera+apk
    • http://katojuwe.betanuchapter.com/uploads/1/3/1/6/131636948/a0e9d924.pdf
    • http://files.jrpaddon.com/uploads/1/3/1/3/131398472/beae019bab08ff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/3121665210.pdf
    • https://cdn.shopify.com/s/files/1/0438/2556/1757/files/word_to_converter_offline_software_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/mefabenibuxefinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1695/3767/files/29336264530.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/victorian_era_literature.pdf
    • https://cdn.shopify.com/s/files/1/0438/0996/4192/files/bartleby_text.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/vojodulotub.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000565e.bin
1236e17762dce2a8f6b10860ccc60cafd088ec2790dce4b53f0cc6daad1d0d31
pdf-font-stream PDF embedded font (sfnt) at offset 0x565E 2992 bytes
font_01_sfnt_off0000610e.bin
0a7662628b4b011ab66aa200b94ef901dc34e6e2bb21681cb0f3acc0c931eada
pdf-font-stream PDF embedded font (sfnt) at offset 0x610E 4976 bytes
font_02_sfnt_off000071ed.bin
359b7f64dcedd3c2b34f733d147a591177fcfccbdb1fa519c61c0bef84ccffe6
pdf-font-stream PDF embedded font (sfnt) at offset 0x71ED 9672 bytes
font_03_sfnt_off00009335.bin
d25787a4c26d5dfe11954a191e1a78b06a4864afc6c230ccab670610fb8eef4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9335 16204 bytes