Malicious PDF — malware analysis report

Static analysis result for SHA-256 55915b8abf0cc18d…

MALICIOUS

PDF

45.2 KB Created: 2020-08-04 16:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e8f526a2ef894da5e45c20e1391d985 SHA-1: f14fe5a4ebcf5da6a836c02054ef470a806abff6 SHA-256: 55915b8abf0cc18d9ab0800ff89eda925805d06b3786d7ee8db97aad497cc4ae
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to domains associated with link farms and redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary malicious URL identified is https://ttraff.cc/pify?keyword=robert+coleman+master+plan+of+evangelism+pdf, which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the malicious URL within the document text and the link farm structure strongly suggest a phishing or redirection attempt.

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=robert+coleman+master+plan+of+evangelism+pdf
    • http://files.malcolmmacdonaldoutlawford.com/uploads/1/3/0/9/130968956/9fc45422.pdf
    • http://files.karynpearson.ca/uploads/1/3/0/7/130775659/rogetewifowixeji.pdf
    • http://files.bamyield.org/uploads/1/3/1/0/131070009/f58b4c3.pdf
    • http://files.tallthingsconsidered.com/uploads/1/3/1/3/131384136/1724348.pdf
    • http://files.misscookbook.com/uploads/1/3/0/7/130739987/af3b4f7.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/16680254643.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/32396474887.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/swot_analysis_of_samsung_company.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2478/files/xigulipukemu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/95949911296.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/zemelitogunezamexe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/wuzojonutevotu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/mawomizefifolesa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7938/5766/files/50993819581.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/butivoxinap.pdf
    • https://cdn.shopify.com/s/files/1/0434/6760/4128/files/4583621723.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/jubimatuwalizemufivez.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/18374108342.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007131.bin
d75d8b6ba4632063810d04f2c0de058d93484660f1cc16c058cb89135fc8b321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7131 5684 bytes
font_01_sfnt_off00008478.bin
821de05316aa93da1b9f30f816d4275ba7a1e2c6db4ed4f3c2cab4965aa4af5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8478 10272 bytes

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