Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e6d9a7250f97d6…

MALICIOUS

PDF

36.6 KB Created: 2020-08-19 16:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a8ba865db925daa4da1d17fc6f13f5f SHA-1: 770b94768bd5eae7e98d8e2bbd170cee16040047 SHA-256: 06e6d9a7250f97d6311b479a01f527d75e53dc3c1a734829ed94b54e72557974
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'benji bananas apk'. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect the user to a malicious site for further exploitation.

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/pify?keyword=benji+bananas+apk
    • http://files.lighthousecanecorso.com/uploads/1/3/0/9/130968984/5233536.pdf
    • http://files.nourishabley.com/uploads/1/3/2/6/132681144/773db0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/76944609879.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/22604262733.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/cancer_de_esofago_estadios.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/79516230.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/67339368893.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/dowikuwuteterof.pdf
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/42145031983.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/budojoxudabolikegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/73877562332.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/wunafomizazezojijos.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/15355260607.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_off00005176.bin
6e9a203ac88e2bdd27343256b309fc7ebc4521c7984c52094a99f59d69e0f6d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5176 5016 bytes
font_01_sfnt_off0000629a.bin
f53e72f5c2f6f70ce60820a73a0033f2aa5e85ef89f6932fbe3f7833b7f9bf3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 10352 bytes