Malicious PDF — malware analysis report

Static analysis result for SHA-256 13cce254f8627f6a…

MALICIOUS

PDF

43.3 KB Created: 2020-09-01 04:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bff3a5c84cd4a0c14a9857e594b07bd SHA-1: a44fffe17ff3666781537857770ef7cdb7ccf0a0 SHA-256: 13cce254f8627f6a5eb568d07954e2a1a0ae3a341b20ae31197c6eb4a4889bea
154 Risk Score

Malware Insights

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

The PDF document contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the redirector. This suggests a phishing or social engineering attack aimed at directing users to malicious infrastructure.

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=awaken+the+giant+within+gujarati+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.indictrans.org
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/bistro_menu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/zuses.pdf
    • https://cdn.shopify.com/s/files/1/0437/4590/2746/files/kirononovojutepilijum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/vapazumira.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_7a9e5831151546f58e16c179c0d2a465.pdf
    • https://static.usrfiles.com/ugd/c8a981_786c8719c0934ad8a29102567c869aca.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/67366530753.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/81832703285.pdf
    • https://cdn.shopify.com/s/files/1/0432/9734/1604/files/lolerugewu.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4ad87bbb5ac45b1b7a6d1efa8027d16.pdf
    • https://static.usrfiles.com/ugd/c345b0_d9c93460d5704b7781806672e4146762.pdf
    • https://static.usrfiles.com/ugd/ab63e3_267bb8e93f554cc89cc7104040ab80b6.pdf
    • https://static.usrfiles.com/ugd/d775a9_e870a3c6f82f40fda70a44cc0b992fd5.pdf
    • https://static.usrfiles.com/ugd/3aee12_4be746cb1d5e4499b026b40f46482922.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f41.bin
5914bc1202f28631bf5b0d8b6c780c9db5ecbddadd413513725dda8575489aec
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F41 5316 bytes
font_01_sfnt_off0000616e.bin
ee89723678ff42062f5bb923b9efb7522b4001b5da8e58bc8787b5475c6fcab9
pdf-font-stream PDF embedded font (sfnt) at offset 0x616E 9016 bytes
font_02_sfnt_off00007f1b.bin
f03c4812a86a45fd66658e450ccb1b9a4cd4f16980ec0837764568b8a3f58dac
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1B 9576 bytes