Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e99727c371c6090…

MALICIOUS

PDF

47.6 KB Created: 2020-08-04 11:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8066d48cdf554a9549bf723a07520c18 SHA-1: f140f2ad7960fde82436d386e6d75de9c60cbbc6 SHA-256: 0e99727c371c6090f0b52b5e1cebd4cf46ab63dbba62ff52584bc0b53c4fe47a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to attract search engine traffic and lead users to malicious content. The primary malicious URL is https://ttraff.cc/pify?keyword=the+catechism+of+the+catholic+church+pdf, which is likely used to redirect users to a second-stage payload.

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=the+catechism+of+the+catholic+church+pdf
    • http://files.unitederitreanla.com/uploads/1/3/1/8/131856956/mafuwizux.pdf
    • http://files.worldinmyhead.com/uploads/1/3/1/4/131453818/725622.pdf
    • http://files.azlife.church/uploads/1/3/2/7/132740278/1769bf88e1a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/small_review_safe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/40551630736.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/11.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/medolizevewilafafut.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/6360047859.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/fuwokotibojilugegamusivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/12149317733.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3990/files/zefuguramutidokeruwimeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/17895583782.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/30679591640.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/305869957.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/48481630836.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f2a.bin
c594a16ea4e22c32b9ad49bc5ca4a46b97cd29802089c1f3ab79010643b00082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 5120 bytes
font_01_sfnt_off0000808d.bin
34ae03946b31c249e26283a72e8b5a4e53016e1c756b80a37441fd9d400061d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808D 10196 bytes
font_02_sfnt_off0000a36c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA36C 4324 bytes

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