Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63f2a2542da6985…

MALICIOUS

PDF

40.3 KB Created: 2020-09-16 17:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7303c7ae4ba4355ebca5a087c81a65a SHA-1: 40b31b4b49ace5ef366c5bc99b99e4faa7e1ae49 SHA-256: f63f2a2542da6985b91aa962418333c3f109c1f4a80fced0a7f6d578d4e549b9
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings. The primary attack pattern involves luring users through these links, likely to phishing or malware download 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.club/wix?keyword=the+most+dangerous+game+general+zaroff+character+analysis
    • http://fewofi.benmarshallwriter.com/uploads/1/3/1/4/131452917/29fcee.pdf
    • http://bileso.womansclubofpowhatan.org/uploads/1/3/1/3/131379021/8a09dd6.pdf
    • http://files.eddyefaw.com/uploads/1/3/1/3/131379213/nibamekuxuzu.pdf
    • http://files.medicusforensics.com/uploads/1/3/1/4/131483386/b57998b.pdf
    • http://motelo.anavantage.com/uploads/1/3/0/8/130874565/4645fa6.pdf
    • http://files.storecee.com/uploads/1/3/2/6/132682210/jixuso-wadovazaw-jexofuweza.pdf
    • https://7779d259-2020-4876-8ff3-d46c2b4fb4b3.filesusr.com/ugd/ab922d_69a2c029697f4786915394b34627070f.pdf?index=true
    • https://b79d7d34-612e-4001-a89b-24008e3871bd.filesusr.com/ugd/4bdc6d_ec0d49ad2d594baa94e6af3555b8d509.pdf?index=true
    • https://20934f9a-30f6-4996-b5af-4639fcb736b3.filesusr.com/ugd/29c71c_18587ebd6b4f4da9aea9a748962a3f9e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/3265/7575/files/apple_music_apk_latest.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/72657049518.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_off00005e89.bin
33f8dbb6ec9c9ccce991d94ffb30becda157377c8ec3e64d443159ae365a6b71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E89 5536 bytes
font_01_sfnt_off0000713d.bin
f4383354f9e45c38a34efdf528a8121ceed8c01f1a43ab231c79dc065d10b73d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713D 10288 bytes

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