Malicious PDF — malware analysis report

Static analysis result for SHA-256 331a19e736b3d9e1…

MALICIOUS

PDF

41.5 KB Created: 2020-08-02 22:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30fb7522bbace6f18cbd0cb05ee115f3 SHA-1: 986b45b98a3863619fc47d7dd5c8ae0ffb5d6f8f SHA-256: 331a19e736b3d9e1411451bc273d342e5a26f69220d7f127c52b5f7cd788c954
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with multiple links pointing to shopify.com domains and a primary redirector at ttraff.cc. The document body text, though partially corrupted, includes the URL 'https://ttraff.cc/pify?keyword=kissanime+bookmark+list', indicating a lure to a potentially malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links confirms a malicious intent to lead the user to harmful content.

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=kissanime+bookmark+list
    • http://files.renaissancecraftables.com/uploads/1/3/1/8/131856574/a078c.pdf
    • http://files.english4apachs.org/uploads/1/3/1/4/131452958/simosenekitegal.pdf
    • http://files.redgatecustoms.com/uploads/1/3/0/8/130813639/92047.pdf
    • http://files.balancebodyandsole.com/uploads/1/3/0/9/130969545/5355017.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/xanoride.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6053/files/30119245963.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/wazuwolixogimedipodonawa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9028/7517/files/fogogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/51874605598.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/52543453389.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lobusine.pdf
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/xodaluboruvuranijitef.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/ginibotovenasimumuzivogir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/45542635047.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006645.bin
6dd64508d191d08d211390d4cc88db99671a352f071af2964bf63ccc9c3d2038
pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 5004 bytes
font_01_sfnt_off0000772d.bin
44185c14121f74ea104d54ff3f20acb4a3a482f261128a7948836af72bc21f15
pdf-font-stream PDF embedded font (sfnt) at offset 0x772D 10052 bytes