Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a386a5fc96d0605…

MALICIOUS

PDF

43.5 KB Created: 2020-08-11 07:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6ca42c6ddf98eeb847efca86b8ed2df SHA-1: a7e59d2825b1357b015846d5aa833f69dcc39902 SHA-256: 6a386a5fc96d0605391edc63c97dfa42fd448d91ae3f26af430b56f324220f14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to a link farm designed to redirect users to potentially malicious content. The primary redirector URL identified is https://ttraff.cc/pify?keyword=barcelona+pavilion+plan+pdf, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise its malicious nature. The ML classifier strongly supports the malicious verdict.

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=barcelona+pavilion+plan+pdf
    • http://files.customweddingringsmelbourne.com/uploads/1/3/2/7/132710780/senexevuza_senalupumi_nijuvojizasojix.pdf
    • http://files.fitzgerald-and-co.com/uploads/1/3/1/3/131383493/somijomuf.pdf
    • http://files.mbirds.ca/uploads/1/3/2/7/132740951/fimojinesig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8818/3447/files/gukelobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6042/7928/files/12642785143.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/57857825118.pdf
    • https://cdn.shopify.com/s/files/1/0433/0343/6446/files/8593531239.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/14406263454.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6034/files/canon_6d_ii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/muwefumabatid.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/minecraft_1._8_8_shaders.pdf
    • https://cdn.shopify.com/s/files/1/0439/1154/4987/files/chacun_sa_route_partition.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/48285342065.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_off00006b04.bin
150c6530663e5e14645cbcb015c4284a1412f4aa075028af34bb2c25a5af11d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B04 5080 bytes
font_01_sfnt_off00007c5a.bin
2b7dfe286e1029d9a0174396f1272080687f24a041e9d0fc482d29611cd76b1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5A 10176 bytes