Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ed640cc22fd91f…

MALICIOUS

PDF

45.2 KB Created: 2020-07-25 22:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9883de8b25ec5e5eb38077454a0d8e0 SHA-1: e8907afaede7002905a98800d881dbe6efb69575 SHA-256: 20ed640cc22fd91ff3dcc7840f0b05cc44559cb7cfd5a388a51a2fcc55524611
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=new+acc+lipid+guidelines'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to distribute content or traffic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL and link farm indicate a redirection-based attack pattern.

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.ru/pify?keyword=new+acc+lipid+guidelines
    • http://files.carriedi.com/uploads/1/3/0/8/130814057/fazipuliv_pofixu.pdf
    • http://files.eogburn.com/uploads/1/3/0/8/130814623/refeb.pdf
    • http://files.southwestdistrictcoinclub.com/uploads/1/3/1/4/131438234/rilenezerasaf_zasiroluga_wufoxusuwukoxik_vuvitixikoziles.pdf
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/92345742439.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/telosadekoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruketisoren.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/xikavutadekex.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/rojamuforusasopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/35694482354.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/gazikanazigojurorasagim.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/22968883013.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/16261828532.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/71916660268.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/73868181953.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/solataxizalazumevisuv.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/
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/xika

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ff.bin
931276b0a7137d0038d59a457345c9413c29c44e5f864456597132fc70799064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FF 4896 bytes
font_01_sfnt_off000084c0.bin
4d5358b10983e33f30af512415d0c6e2a6fd700f6b03fdbcb9115a170c1a2af1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C0 10224 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.