Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e543b2cccc6169…

MALICIOUS

PDF

58.3 KB Created: 2020-08-31 03:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f1956b002674a02f31a81700b996dcf SHA-1: e9b1bdc6262452d0a2c2498af439ef3c1c49a25f SHA-256: 66e543b2cccc6169d4ec533f700fdd9f2b0851bbbfaafe7ca67de2595e5fbd93
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect the user to a malicious site, likely for phishing or malware distribution.

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/wix?keyword=smite+attack+speed+cap
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/89938231491.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/74872005982.pdf
    • https://cdn.shopify.com/s/files/1/0436/3173/9033/files/annexure_e_passport_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/inkscape_to_svg.pdf
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/90547747306.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/36221011963.pdf
    • https://static.usrfiles.com/ugd/a76634_3353ab298d22489bb679eeb25143a549.pdf
    • https://static.usrfiles.com/ugd/e3ff21_bd9d594620c3404799d6e48ca732daf7.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_87f619d0cc08414292b563b02b4d5a6a.pdf
    • https://static.usrfiles.com/ugd/55f640_07d4354e52614eb4a7cc75b41f5bb34f.pdf
    • https://static.usrfiles.com/ugd/1f2646_52c5e89dc8c5406bb412a8dcbce060ce.pdf
    • https://static.usrfiles.com/ugd/b47706_4b7e66ec0f984bac8a7b138d251d1123.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d6ac805ccef4705aeed88c6bf67e36f.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_off00009faf.bin
8a9788c1e329d9b7b10b1533196f75ed4151a962c69fc31f8f0da62f0eecf5d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAF 5256 bytes
font_01_sfnt_off0000b175.bin
3695e50a88b31c0fdf5dcd1a53f30c691b4db3e28bee184a199859c0c43dd1a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB175 13396 bytes