Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f355180d9f267da…

MALICIOUS

PDF

41.9 KB Created: 2020-08-15 01:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d63bac9cae47a463fb4a5a7cf88b166b SHA-1: 810f89eb7522b4789827e23c6fc2d27b379db60e SHA-256: 6f355180d9f267da8c744a570784f4041366c454f861d73d635bb3c3d97eb388
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to potentially malicious sites. One prominent URL, 'https://ttraff.cc/pify?keyword=adobe+illustrator+cc+2018+tutorials+pdf', is flagged as a malicious redirector. The document body itself is heavily obfuscated but contains references to the same lure URLs, suggesting an attempt to drive traffic to these sites.

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=adobe+illustrator+cc+2018+tutorials+pdf
    • http://raxuribix.amkmusic.com/uploads/1/3/0/7/130739720/36e43a7a.pdf
    • http://files.oshohridayam.com/uploads/1/3/0/7/130776529/527357.pdf
    • http://files.evanjosephsalon.com/uploads/1/3/0/8/130814280/6473726.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/42630016089.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/getajixexatirasodixow.pdf
    • https://cdn.shopify.com/s/files/1/0434/9024/6822/files/cantigas_de_escarnio_e_maldizer.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/kawunepusewejitutozane.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/doena_de_addison_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/betfair_football_trading.pdf
    • https://cdn.shopify.com/s/files/1/0434/5836/3544/files/tractor_bill_of_sale.pdf
    • https://cdn.shopify.com/s/files/1/0437/6641/5517/files/43473123052.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaxolaxowixinetubosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/rinnai_r85_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7998/1470/files/battle_royale_2000_full_movie.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_off00006629.bin
91d3500e47279ac753014d28f1a095e174be48ece17177867a41f032a41c11ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6629 5796 bytes
font_01_sfnt_off000079ec.bin
dd4473761d29ab1f0aa6bdf09089a9b4b7ede9fbb11a4d173b2fce22fca06dc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x79EC 9616 bytes