Malicious PDF — malware analysis report

Static analysis result for SHA-256 788e527b7c2be2f4…

MALICIOUS

PDF

58.3 KB Created: 2020-07-24 23:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2144749a00a917f52fd4354812388ef SHA-1: effbc57c20cd496f9f4c8d47c5526ebe6efd8bd1 SHA-256: 788e527b7c2be2f4740ae48f2c5a0fe43dea795a240e6fa4777caac3720aa5d0
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.cc'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. These elements suggest the document's primary purpose is to lure users to malicious sites, potentially for phishing or malware distribution.

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=website+design+size+template
    • http://files.womenartistsreaction.com/uploads/1/3/2/3/132302863/8d22be5d98d153.pdf
    • http://files.carrollwallace.com/uploads/1/3/0/7/130739247/65ffa27f84929d.pdf
    • http://files.connollyclassrooms.com/uploads/1/3/1/4/131408432/tufufotufefa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5505/4999/files/32345595349.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/92312218028.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/1521384189.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8544/files/gudadunir.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/wumirorili.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/20161483548.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/vakererexejugixogubimimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/wabelezasufare.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/92586854084.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/zoxidonasukuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/wojigobikizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/11323679467.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/rafigadosisupanuvu.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_off0000a587.bin
e13ddc3f765d033794ff4e7e644e79ee4ede85a42b592c042c98d885677e8f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA587 5064 bytes
font_01_sfnt_off0000b6b1.bin
97a21019f9d03b59cf77adeec4d6086fc2720f5b640fc8f6f99afbdc1e8b5894		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B1 10804 bytes

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