Malicious PDF — malware analysis report

Static analysis result for SHA-256 210baa1d545223bf…

MALICIOUS

PDF

43.7 KB Created: 2020-09-07 11:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 291feff1f4ca1427cb13a0dd82b9329f SHA-1: 3cf2abf9b0984dbf95d8fbf0548e46e81552eed5 SHA-256: 210baa1d545223bf042606abc73a4df916eb037488f3578e85dee2b56792ca24
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to "https://ttraff.me/wix?keyword=sky+sports+tv+app". The document body, though heavily obfuscated, contains references to "Sky sports tv app", suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier also 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.me/wix?keyword=sky+sports+tv+app
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/medidas_cautelares_innominadas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7576/3353/files/gulilizuxufo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8555/3059/files/neumonia_complicada_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/wordpress_get_featured_image_url.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/88228092149.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/bioreactor_landfill.pdf
    • https://static.usrfiles.com/ugd/3fb742_c996db6f19cd47d99e5c0c534e26cf0a.pdf
    • https://static.usrfiles.com/ugd/51c472_2f4c7847e6244c97a51de2dc384dd599.pdf
    • https://static.usrfiles.com/ugd/b11f6d_f55c321ed0454c329a658f524a711f57.pdf
    • https://static.usrfiles.com/ugd/10e3af_d497be3509b846d3b9678f95d512b246.pdf
    • https://static.usrfiles.com/ugd/f1c748_02ec56478ee24f5c8ae737c00c9a4f42.pdf
    • https://static.usrfiles.com/ugd/b8c837_04d9a5dc6c114c009b489c546dfeb623.pdf
    • https://static.usrfiles.com/ugd/c1de29_04c02826dca042078866eb81dfe7a9fd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000616a.bin
07dc8ce473a54fd16fdc71d5cdea23d2c7c0056847cd4b1e267c44601c9bc3c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x616A 4628 bytes
font_01_sfnt_off00007132.bin
720990a271f2f4465e5c12de1fbeee7efd4f2048434523c089129d114c244923
pdf-font-stream PDF embedded font (sfnt) at offset 0x7132 10536 bytes
font_02_sfnt_off000093fe.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x93FE 4324 bytes