Malicious PDF — malware analysis report

Static analysis result for SHA-256 1184c7116bc1ff4c…

MALICIOUS

PDF

37.5 KB Created: 2020-07-31 14:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbdd47c4a6727386030d636d04fda0d8 SHA-1: ad6ce0fc3d55e60cedadf93106555be3f2d9922c SHA-256: 1184c7116bc1ff4c69b21474e18a6e467138710ff74bbc689d7ade529828ab4f
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to converting PDF to Word, suggesting a lure. The presence of numerous external links, including one to a Shopify domain, further supports the idea of a link farm or redirection scheme designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pasar+documento+de+pdf+a+word+gratis+en+linea
    • http://files.lucky13bookreviews.com/uploads/1/3/0/7/130775866/virogoxatori.pdf
    • http://files.ondspotentertainmentandprinting.com/uploads/1/3/0/8/130815137/55e73b3bc512.pdf
    • http://files.kenreif.com/uploads/1/3/0/7/130738639/51180b539ec84ce.pdf
    • http://files.teddymountainny.com/uploads/1/3/1/6/131606262/d68370.pdf
    • http://files.brettbrooks.com/uploads/1/3/0/8/130874381/gadevigumozuwoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/sivumoserinixepoloxamisuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/vujipekiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/0467/3699/files/jurexoto.pdf
    • https://cdn.shopify.com/s/files/1/0440/4979/3174/files/2624631750.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/18710290444.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/lupevev.pdf
    • https://cdn.shopify.com/s/files/1/0438/8398/7096/files/94581271015.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/fiwegedofuramozur.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/fawukeda.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/xefakusegubosuzerape.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_off000056fd.bin
bf242e6895dff84ce0652206584c6f8b1ecb300c851dc9903e3ce58599098f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FD 5452 bytes
font_01_sfnt_off00006973.bin
b224e56c885f84122c26a00f8fab1fad2ea476aab5d765d3ac191aa1b2ad92ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6973 9128 bytes

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