Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9a0c281a30bb31…

MALICIOUS

PDF

55.6 KB Created: 2020-07-09 22:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc70e0a77d150174745ced773996c3f3 SHA-1: b3c418cfd3ec4f7666309891a41fb9ea30047043 SHA-256: 4b9a0c281a30bb31f96cb781e354e7a97016642de376abf47491d5d942bc0664
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 ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links. The document body contains the embedded URL, suggesting a lure to a malicious site. No scripts were extracted, but the presence of malicious links indicates a likely phishing or redirection attempt.

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.com/wb?keyword=characteristics%20of%20critical%20pedagogy%20pdf
    • http://files.islandbeautyportland.com/uploads/1/3/0/9/130969243/522dd448b29a.pdf
    • http://files.ericjstokan.com/uploads/1/3/1/6/131636954/931880.pdf
    • http://files.jjeffreymesserole.com/uploads/1/3/1/3/131384018/f3faf9c41e.pdf
    • http://files.marzipan-media.com/uploads/1/3/1/8/131856184/7584706.pdf
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
    • http://files.southlandbaptisttemple.net/uploads/1/3/1/4/131438829/muwurosesap.pdf
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdf
    • http://files.12monthbeauty.com/uploads/1/3/0/8/130874128/6301925.pdf
    • http://files.frankhagancontracting.com/uploads/1/3/2/6/132681404/zatamutofineve.pdf
    • http://files.frankhagan
    • https://zazusovufib.files.wordpress.com/2020/07/vovopemutapixabubavizi.pdf
    • https://ruxejetufe.files.wordpress.com/2020/06/nizeliwarexezusuko.pdf
    • https://gefasiku.files.wordpress.com/2020/07/97794195414.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kerikelamizefebimu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kiragin.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_off00008cce.bin
9ca2194282f3346290c62f6836ecaa6517a5af0601d97bd552c2ff6946bf39e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCE 5224 bytes
font_01_sfnt_off00009eb4.bin
2893d5a39b83eaa3b331f6295a4acb644fd9b31553787acf759f95d06c901eae
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB4 16472 bytes