Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b6706b4886847f…

MALICIOUS

PDF

55.4 KB Created: 2020-08-05 11:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1589d506d6649e02944792dfb95608a SHA-1: df00f25c9d231f007815a32dae6cd42d899029dc SHA-256: d2b6706b4886847f056873b0a5a202439518d56d5abf3bc36d3489c7bed171d3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at `https://ttraff.cc/pify?keyword=don+t+look+back+in+anger+pdf`. The document body also contains this URL and other links pointing to what appears to be a link farm hosted on Shopify, suggesting a coordinated effort to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=don+t+look+back+in+anger+pdf
    • http://files.gianmarcodaniele.com/uploads/1/3/2/7/132712093/6941916.pdf
    • http://files.bodyessencellc.com/uploads/1/3/0/9/130969172/14ec8350.pdf
    • http://files.ecotek.org/uploads/1/3/1/4/131409498/gemonisalodan.pdf
    • http://files.acuizen.com/uploads/1/3/0/7/130776735/julese-vuragino-fifabutekuwitu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/numejofufij.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4685/files/tabizafudujuzodedisixa.pdf
    • https://cdn.shopify.com/s/files/1/0440/9052/3813/files/38701119642.pdf
    • https://cdn.shopify.com/s/files/1/0432/4756/7003/files/captive_prince_tumblr.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/wafitiri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/ponozix.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/dozibapixamuvozare.pdf
    • https://cdn.shopify.com/s/files/1/0436/6853/7497/files/47164633807.pdf
    • https://cdn.shopify.com/s/files/1/0428/4963/2412/files/gisixisojokufubov.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/89500560474.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6191/files/51405180295.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/fe_warriors_characters.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dd8.bin
3a875c0223368313a1f0cd2d5029ff7d0239cb4bebe45b523fdb3fdcc0643dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD8 3136 bytes
font_01_sfnt_off0000990e.bin
e8af233f7d981ded7b77d818ac3633d22695227fea757eacde9d0b8ba7e6a1a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x990E 5348 bytes
font_02_sfnt_off0000ab51.bin
7d7f87e2eb04cc1fcb3a89ec110c420fbfec9a485c118406d40d6b40ed5b71fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB51 10648 bytes

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