Malicious PDF — malware analysis report

Static analysis result for SHA-256 19031414b6111588…

MALICIOUS

PDF

53.5 KB Created: 2020-07-31 00:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fae6b26fd66b1b670828e12e38395b6d SHA-1: 33e9a97dc0079ce3edec89335964cf624059b328 SHA-256: 19031414b6111588ba205ea27e00bf9879e7bf7fb7efc15ce7c121a61b8a6d58
154 Risk Score

Malware Insights

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

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 embedded URLs, many of which are hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lead the user to a malicious site, likely for phishing or to download further malware.

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=asme+standard+for+welding+pdf
    • http://files.battambangparish.org/uploads/1/3/2/6/132681002/d767baf407e6.pdf
    • http://files.thegreenirisinc.com/uploads/1/3/0/9/130969428/2004798.pdf
    • http://files.spwrestling.co.nz/uploads/1/3/1/4/131407944/ralekisu.pdf
    • http://files.karmayogaedinburgh.com/uploads/1/3/2/6/132695200/ritarekamikelomak.pdf
    • http://files.thebinarylivingway.com/uploads/1/3/0/7/130775653/fifedexezubo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaduvezumutup.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/36364613195.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/tufexipemofewumafotexuxon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/42311427876.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/sikobalenera.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/resinekub.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2714/files/pebonutidufor.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/tojadosovataxonojotin.pdf
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/doruzab.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/62489379583.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ranugebiwuzejivuzuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/22848734347.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_off00008cd4.bin
69212c18638d33fab1af0a91b463e22aaecd86a35ba4bcb3c93282eb429135cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD4 5232 bytes
font_01_sfnt_off00009e95.bin
df4f327d16810ced5517d10bbdcb5f84e8d470c2eef70691b64bb31639b265a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E95 13564 bytes

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