Malicious PDF — malware analysis report

Static analysis result for SHA-256 2830fe09583f7666…

MALICIOUS

PDF

53.5 KB Created: 2020-08-07 21:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad3c2e5c9581848a12ffcdb9725c9102 SHA-1: 09f897e865df1f22822488f1ba193a63c76630f2 SHA-256: 2830fe09583f7666e68d60b3d84c57c79ad25127eec4c516d507a18bf5b3d4f1
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=architecture+of+computer+hardware+pdf', suggesting a lure to download further malicious content. The presence of numerous PDF links and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=architecture+of+computer+hardware+pdf
    • http://files.nathanjonesmusic.com/uploads/1/3/2/6/132682134/62e58065350.pdf
    • http://files.iflowproductions.com/uploads/1/3/2/7/132741486/9d9c9fcb41f06b.pdf
    • http://files.bellafaces.net/uploads/1/3/1/0/131070792/domev_pexiwibosisok.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/53148059759.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/ropakepozovunabex.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/34005710174.pdf
    • https://cdn.shopify.com/s/files/1/0439/0020/7272/files/23761546479.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6381/files/kezikesel.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/vobenika.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/55061941071.pdf
    • https://cdn.shopify.com/s/files/1/0431/8091/6893/files/baixar_livro_as_catacumbas_de_roma_em.pdf
    • https://cdn.shopify.com/s/files/1/0430/9994/7162/files/livros_minimalismo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/1104023338.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5164/files/1107_west_42nd_street_richmond_va.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/fipamamej.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/jofolidipaxoge.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_off00008617.bin
7e89f68838b6b4f087e464a7031898488ff7281c008b839b237bff55f70dc1c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8617 5040 bytes
font_01_sfnt_off00009747.bin
7383d46164fd4985d3407b5a93f3c7f3f8cb1ed38b9ab659dee6063163991485
pdf-font-stream PDF embedded font (sfnt) at offset 0x9747 10376 bytes
font_02_sfnt_off0000baaa.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAAA 4324 bytes