Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0f1b2e17674f34…

MALICIOUS

PDF

72.4 KB Created: 2020-08-30 07:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad483763694ce5b59ea5b7c2184ab674 SHA-1: 2a97ca89acabfb26652f9231f0e7bbf608a6985c SHA-256: 0b0f1b2e17674f34baf115b77f96d2fde5a4da8c36f136bcab882a4fc14a712b
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a free download, which redirects to a malicious URL. This is a common social engineering tactic to trick users into visiting malicious sites. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's designed to host external links, 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.me/wix?keyword=corazon+pdf+gr%25C3%25A1tis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8959/1461/files/87480088277.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/92735758766.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/69147260980.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/48840750148.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_43cd335a67d7439f996a11dfd3bbb65e.pdf
    • https://static.usrfiles.com/ugd/824332_dba3457166724969bcab1add41288dee.pdf
    • https://static.usrfiles.com/ugd/0f5b72_c47d5ecb372e41bf9c244b0f4d8f62b1.pdf
    • https://static.usrfiles.com/ugd/0aab01_7620d54f00454a9791085392faafbc17.pdf
    • https://static.usrfiles.com/ugd/8127dd_92213bb03563444db3b7532c01bc16b0.pdf
    • https://static.usrfiles.com/ugd/7041e4_fc54778b68b24cc1be484de95eb5001c.pdf
    • https://static.usrfiles.com/ugd/ab0441_77dfe87aed8742929673a2344afad8ba.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/bakafokajojuwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/kakapusabavirom.pdf
    • https://cdn.shopify.com/s/files/1/0447/9139/8561/files/97685151026.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_off0000d3f0.bin
8b36261f541832d19a44a908d5e547017ae8b33a13c241fe0899158170e1e3ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F0 5368 bytes
font_01_sfnt_off0000e5b8.bin
11e4c7de2d90fcdb93199c798917b914df814ae1162e977a8a5da123f4e596a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 15440 bytes